The Ritz was a chain of hotels and dance halls in London and Cardiff.
Its address was 11 Richmond Street. (AUDIO: A Kill to a View)
It opened in 1932 and closed down in 1989. On 20 January 1941, the Kiss the Boys Goodbye Dance was held there.
While visiting the Ritz after its closure, Jack Harkness and Toshiko Sato were taken back in time to the Ritz in 1941. While there, they encountered the real Jack Harkness and Bilis Manger. (TV: Captain Jack Harkness)
The Ritz was knocked down two years prior to the Sorvix invasion of Cardiff and the land was used to build Ritz Tower. (AUDIO: A Kill to a View)
In 1953, the Sixth Doctor and Peri Brown rented a suite at the Ritz to watch the coronation of Queen Elizabeth II from. (COMIC: Where's the Doctor?)