Sharon Stone used to tell people in the 90s that she was a member of Mensa, but the organization denied her claim, instead stating that she used to bring cookies to meetings.
Mensa is a high IQ group of smart people, but not everyone wants to join a group that shares that commonality. While there are members who enjoy being part of Mensa, it's not for everyone.
Mensa, the high IQ society that was founded in the UK in 1946, got its start because of a chance encounter on a train between post grad student Lancelot Ware and 50-year-old Roland Barill who were both interested in testing intelligence.