Denny's From Denny's beginning in 1953 in Lakewood, California, Denny's has grown into one of America's largest full service restaurant chains. With over 1,800 locations, you can enjoy Denny's restaurants nationwide within the United States, Canada, Costa Rica,Guam, Meixco, New Zealand, and Puerto Rico. We are committed to becomming the best family restaurant system in the world. Denny's care in recruiting, training, and developing franchisees is a key factor in the growth of our franchise system.