The Savoy is a hotel in London that is most known for its hotel bar, The American Bar. The American Bar at The Savoy was THE place to be seen drinking mixed drinks, now referred to as cocktails, if you were an American in England during prohibition.
The American Bar gained its status as the premiere destination for alcohol-deprived Americans under the tutelage of the American bartender Harry Craddock who fled from prohibition to England in 1925. Craddock is generally credited with introducing the Dry Martini to England.
The Savoy and The American Bar are still open and are located on the Strand in London, next to the Savoy Theatre of Gilbert and Sullivan fame.