This was also when the chain began offering around-the-clock dining, catering to customers looking for a late-night caffeine fix. The name eventually became Denny's Coffee Shops in 1959, as a competing Los Angeles-based chain called Coffee Dan's was leading to confusion. It was later shortened to Denny's in 1961, and the diner franchise continued to expand, going international in '67. Unfortunately, Denny's announced the closing of hundreds of its locations by the end of 2025. But don't worry! There are over 1,000 Denny's diners still operating.