What a classic crew.
pulled from wikipedia:
According to Stephen Bogart, the original members of the Holmby Hills Rat Pack were Sinatra (pack master), Garland (first vice-president), Bacall (den mother), Sid Luft (cage master), Bogart (rat in charge of public 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.[2][3] In his autobiography The Moon’s a Balloon, Niven confirms that the Rat Pack originally included him but not Sammy Davis Jr. or Dean Martin.
The 1960s version of the group included Frank Sinatra, Dean Martin, Sammy Davis, Jr., Joey Bishop, Peter Lawford, and for a brief stint, Norman Fell. Marilyn Monroe, Angie Dickinson, Juliet Prowse, and Shirley MacLaine were often referred to as the “Rat Pack Mascots”, a title which reportedly made these ladies feel like “one of the boys”. The post-Bogart version of the group (Bogart died in 1957) was reportedly never called that name by any of its members — they called it the Summit or the Clan. “The Rat Pack” was a term used by journalists and outsiders, although it remains the lasting name for the group.
Often, when one of the members was scheduled to give a performance, the rest of the Pack would show up for an impromptu show, causing much excitement among audiences, resulting in return visits. They sold out almost all of their appearances, and people would come pouring into Las Vegas, sometimes sleeping in cars and hotel lobbies when they could not find rooms, just to be part of the Rat Pack entertainment experience. The marquees of the hotels at which they were performing as individuals would read, for example, “DEAN MARTIN - MAYBE FRANK - MAYBE SAMMY”…