Every professional needs a card, and in the 70s and '80s, Chicago gangs had their own as well. The Insane Freaks and The Insane Lady Vigilantes were just a few of the gangs to promote their crews with calling cards. Bats, skulls, crucifixes and everything else you could imagine. Hit the thumbs to see a detailed look at Chicago gang cards from the '70s and '80s. [Flavorwire]
