Special Interest Groups :
Whatever your passion, there's almost certain to be a Special Interest Group (SIG) filled with other Mensans who share it! Mensa offers approximately 200 SIGs, in mind-boggling profusion from African Violets to zoology. Along the way you'll find microbiology, and systems analysis, but you'll also find Sherlock Holmes, chocolate and Star Trek.
There are the expected: biochemistry, space science, economics -- and the unexpected: poker, roller-skating, scuba diving, UFOs and witchcraft. There are SIGs for breadmaking, winemaking, cartooning, silversmithing, and clowning. Heraldry, semantics and Egyptology co-exist with beekeeping, motorcycling and tap dancing. Sports SIGs cover the classics (baseball, basketball, and football) and the not-so-classic (skeet shooting, hang gliding, skydiving). And any Mensan who can't find a SIG to join can easily start one.