You know on Mangafox they play Mafia games all the time but on the scales of 40+ players. Although generally theres about 10~15 ish people who vanish, they're pretty awesome. Sadly, everyone seems to know each other and its a circlejerk making it hard for new people to really get in on the fun. Cuz everyone else will be PMing each other and you need to hope they let in on the action :/