Organized Parties
Apparently, Sinatra organized tons of parties in the 1960s for certain taboo "activities" with his friends. These parties were held in the steam rooms of a casino's health club. Women from all over were invited to hang out with these high-profile men. There were even rumors that JFK was a regular at these parties.
Humphrey Bogart's Death
After original member Humphrey Bogart passed away in 1957, the rat pack actually never referred to themselves as the rat pack. The term was only really used by the media and public to describe the group. The members preferred to call themselves the Summit.