Sizzler
Sizzler has been a staple of American culture since 1958, but not for much longer. In September 2020, the company filed for bankruptcy, claiming that the coronavirus had been detrimental to sales. Apparently, foregoing the dine-in element of the Sizzler experience was enough to lose customers' interest.
Denny's
Denny's is the classic American pancake house, known for serving breakfast, lunch, and dinner at all hours of the day. The restaurant only closes when required by law. Despite their dedicated schedule, the company was forced to close 1,700 restaurants in 2020, including 15 New York locations.