Les Ambassadeurs Club (also known as "Les A") is a private club and casino located at 5 Hamilton Place in the Mayfair area of London, England.
The club was originally established on Hanover Square in 1941 by John Mills, and it has had several owners since Mills sold it in 1981. The club moved to 5 Hamilton Place in 1950, and Le Cercle casino was established at the club in 1961. The Milroy and Garrison nightclubs have also been based at 5 Hamilton Place. The club was portrayed in the inaugural James Bond film, Dr. No, and scenes from The Beatles' film A Hard Day's Night were filmed at the club.