Fat Shack

Fat Shack is an American fast-casual restaurant brand that developed around a late-night, indulgent menu and an operating model designed for customers seeking substantial prepared food outside conventional dining hours. The concept began in February 2010 in Ramsey, New Jersey, where Tom Armenti and longtime friends used a family-owned bagel shop after its daytime operation ended. The new restaurant opened in the evening and continued through the early morning, typically operating from approximately 6 p.m. to 4 a.m. This unusual use of an existing food-service location helped establish the brand's original late-night identity while limiting the need for a separate daytime facility. Armenti relocated to Fort Collins, Colorado, in August 2011 and opened the first full-size Fat Shack restaurant there. The Colorado location became the base for developing the concept beyond its original pop-up-style setting. Kevin Gabauer, a college classmate and close friend of Armenti, subsequently joined the business. Together they reorganized the menu, refreshed the brand, and simplified restaurant operations. Within roughly six months of Gabauer's involvement, the company opened a second location in Boulder, Colorado. Fat Shack began franchising in February 2015 with a restaurant near the University of Denver. It then added more Colorado locations before expanding beyond the state, including an interstate move into Denton, Texas. The brand's growth model combined company-operated and franchise-owned restaurants. According to the cited Wikipedia material, the chain had 31 corporate and franchise-owned restaurants across 14 U.S. states as of September 2025, with a Sioux Falls, South Dakota, opening representing its entry into that state. The menu is the central expression of Fat Shack's positioning. Its signature products are large "Fat Sandwiches," drawing inspiration from the grease trucks associated with Rutgers University. These sandwiches are complemented by burgers, chicken wings, Philly cheesesteaks, mozzarella sticks, milkshakes, fried desserts, and other high-calorie comfort-food items. Examples of specialty products include deep-fried macaroni and cheese and seasonal deep-fried mint Oreos offered during March. Some menu items are exceptionally calorie-dense, with certain offerings reported to exceed 2,000 calories. The brand received broad national exposure when Armenti and Gabauer appeared on the season-ten finale of ABC's Shark Tank in May 2019. The entrepreneurs presented the company as a rapidly expanding restaurant and franchise opportunity. The episode highlighted reported lifetime sales of $22 million and concluded with an agreement involving investor Mark Cuban for $250,000 in exchange for 15 percent of the company. The appearance generated immediate franchise interest; the cited account says the company received hundreds of requests and accumulated more than 3,000 inquiries within 48 hours of the broadcast. The available reference material does not establish whether the televised investment closed on its original terms or describe its later financial consequences. Fat Shack's market identity therefore rests on three connected attributes: late-night accessibility, oversized and heavily indulgent American comfort food, and franchised expansion. It is not documented in the supplied sources as a publicly traded company, as part of a larger restaurant conglomerate, or as an international chain. Its documented operations and growth remain concentrated in the United States.

Fat Shack originated in February 2010 in Ramsey, New Jersey, when Tom Armenti and several longtime friends created a late-night restaurant inside a family-owned bagel shop. The shop operated normally during the day, while the Fat Shack concept took over in the evening after the daytime staff had left. Its initial operating window, extending from approximately 6 p.m. to 4 a.m., made the brand particularly suited to late-night customers and helped define its early identity. In August 2011, Armenti moved to Fort Collins, Colorado, and opened the first full-size Fat Shack restaurant. This became the foundation for a more conventional permanent-store format. Kevin Gabauer, an Armenti college classmate and close friend, joined the company and worked with him to reorganize the menu, refresh the visual and operating concept, and simplify execution. A second restaurant opened in Boulder within approximately six months of Gabauer's involvement. The company entered franchising in February 2015 with its first franchise restaurant near the University of Denver. Further Colorado locations followed, after which Fat Shack expanded across state lines, including an opening in Denton, Texas. The resulting network combined corporate and franchise-owned restaurants. The brand's menu has remained its principal point of differentiation. Its large Fat Sandwiches were inspired by the grease-truck food culture associated with Rutgers University. The broader menu includes burgers, chicken wings, Philly cheesesteaks, mozzarella sticks, milkshakes, fried macaroni and cheese, and fried desserts. Seasonal items have included deep-fried mint Oreos during March. The menu emphasizes size and indulgence, and some items are reported to contain more than 2,000 calories. National attention increased in May 2019, when Armenti and Gabauer appeared on ABC's Shark Tank. The presentation cited $22 million in lifetime sales, and the founders reportedly reached a deal with Mark Cuban for $250,000 in exchange for 15 percent of the company. The appearance produced a sharp increase in franchise inquiries, including more than 3,000 reported requests within 48 hours. The available reference does not verify the final closing terms or subsequent performance of the investment. By September 2025, the cited Wikipedia account described Fat Shack as having 31 corporate and franchise-owned restaurants in 14 U.S. states. A Sioux Falls, South Dakota, location was identified as the chain's latest opening and its first in that state. The supplied sources do not document international operations, a public listing, a parent conglomerate, or a change away from the brand's fast-casual and late-night focus.

• 2025

  Expansion to Sioux Falls

  [1]Fat Shacken.wikipedia.org

  The company opens in Sioux Falls, South Dakota, and is reported to have 31 locations across 14 states as of September.

• 2019

  Shark Tank appearance and reported investment deal

  [1]Fat Shacken.wikipedia.org

  The founders appear on Shark Tank and report a deal with Mark Cuban for $250,000 for 15 percent of the business.

• 2015

  Franchising begins

  [1]Fat Shacken.wikipedia.org

  Fat Shack opens its first franchise restaurant near the University of Denver.

• 2011

  First full-size restaurant opens in Fort Collins

  [1]Fat Shacken.wikipedia.org

  Armenti relocates to Colorado and opens the first permanent full-size Fat Shack restaurant in Fort Collins.

• 2011

  Boulder location follows operational refresh

  [1]Fat Shacken.wikipedia.org

  Kevin Gabauer joins the business, helps reorganize the menu and operations, and the company opens another location in Boulder.

• 2010

  Late-night concept begins in Ramsey

  [1]Fat Shacken.wikipedia.org

  Tom Armenti and friends begin operating Fat Shack from a family-owned bagel shop during evening and overnight hours.

A late-night American fast-casual restaurant brand focused on oversized, indulgent comfort food and franchise growth.

• Signature sandwiches · 2010

  Fat Sandwiches

  The brand's defining menu line consists of oversized sandwiches inspired by the grease-truck food tradition associated with Rutgers University. They represent Fat Shack's emphasis on large portions, rich fillings, and late-night comfort food.

• Sandwiches

  Philly Cheesesteaks

  Philly cheesesteaks are part of the chain's broader hot-sandwich offering. They extend the brand's focus beyond its signature Fat Sandwiches while retaining the substantial, prepared-to-order comfort-food positioning.

• American fast food

  Burgers and Chicken Wings

  Burgers and chicken wings provide familiar American fast-food staples within the Fat Shack menu. They complement the sandwich range and help the restaurants serve customers looking for conventional handheld meals or shareable fried items.

• Sides and desserts

  Fried Sides and Desserts

  The menu includes mozzarella sticks, deep-fried macaroni and cheese, and fried desserts. Seasonal products have included deep-fried mint Oreos during March. These items reinforce the brand's deliberately indulgent identity and contribute to its late-night appeal.

• Beverages

  Milkshakes

  Milkshakes accompany the chain's sandwiches, fried foods, and desserts, adding a traditional fast-casual beverage-and-treat option to the menu.

• 2019

  Televised investment agreement with Mark CubanM&A

  Background

  Fat Shack's founders presented the company on Shark Tank during a period of franchise expansion and cited $22 million in lifetime sales.

  Action taken

  The founders reportedly agreed during the program to accept $250,000 from Mark Cuban in exchange for a 15 percent stake.

  Aftermath

  The broadcast generated substantial franchise interest, including a reported 3,000-plus inquiries within 48 hours. The supplied source does not establish whether the deal ultimately closed on the televised terms.

  Reported investment offer and equity stake. $250,000 for 15% (May 2019)

  Source

1. 1Fat Shacken.wikipedia.org