The OK Diner is a privately owned roadside restaurant chain in the United Kingdom. The restaurants have a retro 1950s style American diner theme, with popular 1950s music, chequerboard flooring, booth seating, plenty of chrome details and 1950s memorabilia on the walls. The concept was created by John Roebuck and Tony Horsfall for City Centre Restaurants (now The Restaurant Group) and was sold to co directors Ian Hendry and Dafydd Poole, following a management buy out in January 2001. But in October 2014, Dafydd Poole bought out his partner, and is now operating the diners.