Ianni, in his book Black Mafia: How is it moral to steal lunch money from children?free online web authoring tools GAMBLING BLOGER 9: Gambling - Mafia businesses can be both legit and non-legit. Find out what businesses the Mob has its hooks in, and how it maintains control. La Cosa Nostra had always been involved in gambling, from numbers games to sports betting. They operated luxurious, illegal casinos through the United. Gambling has always been a very important business in the Mafia. From card games to betting on horses and other sports, the Mafia has earned cash from all of.