I'm going to guess that there were, and are, a lot of gay men in the mafia, made or otherwise. It's silly to try to figure out who is based on what they look like or how they act, and it only perpetuates stereotypes, which is counterproductive to civilization. I'm going to defer to the sociological studies on the topic and go with the approximate 25% number that they apply to the rest of society. 1 in 4 in everyday life are gay, then as far as I'm concerned 1 in 4 in the mob are gay, too. Just because they can never act out on it doesn't mean they aren't. Some are in the closet. Some have never had any sexual relationship whatsoever with a man. But the biology is there, even if they're living a lie, to survive in a world where homosexuality is forbidden.