Hey there forum lurkers. I used to run periodic mafia games on the BHP forums, along with other hosts.
One of the quick games I used to run were the APB themed mafia games, where soviets in their base try to capture allied spies before the allies can eliminate and outrun the soviets (mafia scum vs town in general mafia terms). Basically I PM players what they are and what their role is, and when the game begins, players try to figure out who is who (or what), based on other players' actions