Rat Pack relations), Swifty Lazar (recording secretary and treasurer), Nathaniel Benchley (historian), David Niven, Katharine Hepburn, Spencer Tracy, George Cukor, Cary Grant, Rex Harrison, and Jimmy Van Heusen. In his autobiography "The Moon's a Balloon", David Niven confirms that the Rat Pack originally included him but neither Sammy Davis, Jr. nor Dean Martin. The 1960s version of the group included Frank Sinatra, Dean Martin, Sammy Davis Jr., Peter Lawford, and Joey Bishop. Marilyn Monroe, Angie Dickinson, Juliet Prowse, Buddy Greco, and Shirley MacLaine were often referred to as the "Rat Pack Mascots". The post-Bogart version of the group (Bogart died in 1957)
500 Club supper service featured top-billed acts in the summer months and for special bookings. The 500 Club became one of the most popular nightspots on the East Coast, regularly attracting top-name talent. Performers included Frank Sinatra, Sammy Davis, Jr., Martin and Lewis, the Will Mastin Trio, Jimmy Durante, Eartha Kitt, Patti Page, Sophie Tucker, the Jackie Paris Trio, Milton Berle, Nat King Cole, and Liberace, among many others. Frank Sinatra called on his friendship with D'Amato to perform at the club in the 1940s when his career was at a lull. He regularly performed there from the 1940s through to the