Sibylla's was a nightclub in the West End of London that operated from 1966 to 1968. It was located at 9 Swallow Street, on the edge of Mayfair and close to Piccadilly Circus. The club's launch on 22 June 1966 was attended by many artists and celebrities, including the Beatles, members of the Rolling Stones, Michael Caine, Julie Christie, David Bailey and Mary Quant. Like the Ad Lib and the Scotch of St. James, the club was a popular meeting place for rock musicians and other artists until trends changed in the London scene.