The article discusses the top ten old-school diners in Denver, including the iconic Breakfast Inn, Tom's Diner, the Breakfast King, Nick's Cafe, and Annie's Cafe. While the age of 24/7 diners has faded, some favorites are still serving late into the night and through early morning, like Pete's Kitchen. The article also highlights 20th Street Cafe Mexican, which served classic diner food for 74 years before reopening three years later. The Apple Ridge Cafe serves dependable food, friendly service, and a comforting atmosphere. Other notable diners include Breakfast Palace, which serves free Thanksgiving meals. The Breakfast Queen has been a delighting delighting residents of South Broadway for over twenty years.