Denny's Corp operates or franchises over 1,500 restaurants in the United States and more than 100 restaurants internationally. Most restaurants are open 24 hours per day, with over one third of total sales generated between late Friday night and Sunday lunch. Denny’s franchises more than 90% of its restaurants. Nearly half of the company’s United States restaurants are in California, Texas, or Florida, and the majority of its international restaurants are in Canada. Both company-owned and franchised restaurants purchase food and supplies through third-party vendors that are contracted by the company.