Originally opened as a coffee shop under the name Danny's Donuts, Denny's is now known for always being open and serving breakfast, lunch, and dinner around the clock. Denny's does not close on holidays and nights, except where required by law. Many of the restaurants are located in proximity to freeway exits, bars, and in service areas. Denny's started franchising in 1963, and most Denny's restaurants are now franchisee-owned.

Denny's (also known as Denny's Diner on some of the locations' signage) is an American table service diner-style restaurant chain. It operates over 1,600 restaurants in the United States (including Puerto Rico and Guam), Canada, Costa Rica, El Salvador, Mexico, The Dominican Republic, Guatemala, Japan, Honduras, New Zealand, Qatar, Philippines, United Arab Emirates, Curaçao, and the United Kingdom.

Originally opened as a coffee shop under the name Danny's Donuts, Denny's is now known for always being open and serving breakfast, lunch, and dinner around the clock. Denny's does not close on holidays and nights, except where required by law. Many of the restaurants are located in proximity to freeway exits, bars, and in service areas. Denny's started franchising in 1963, and most Denny's restaurants are now franchisee-owned.

According to wikipedia