Denny's Corp. is one of the largest full-service family restaurant chains in the United States. For more than 50 years, the restaurant company has been offering round-the-clock breakfast and casual family dining services. Its menu features a range of traditional American-style food, including breakfast items, appetizers, sandwiches, dinner entrees and desserts. Located in Orlando, Fla., Denny's Corp. operates more than 1,600 franchised and company-owned restaurants across the United States, Canada, Costa Rica, Mexico, Guam, Honduras, Puerto Rico and New Zealand.