Workshop

Hmm. I'm ready to offer a different setting. + my services as a game master for it, yes, yes :-)

So. The setting: Star Wars (the Imperial March plays in the background), during the time of the Rebel Wars.
There are two "mafias" - the Rebels and the Syndicate. The "city" is represented by Imperial troops and ordinary citizens.
The location: the planet Tatooine. Yes, again.

Roles:
Magnate: a wealthy citizen who has his own ways of influencing the jury.
Property: 2 votes.
Status: good

Imperial Officer: a representative of the Imperial security forces.
Night Action - checks statuses or protects against an attack.
Status: good

City Doctor: the head of the local hospital - a master of his craft... but attempts to treat healthy people sometimes end in their untimely death.
Night Action: revives. If he tries to treat a healthy person, there is a 25% chance he will kill him (malicious treatment), and everyone will find out about the murder.
Status: good

Cantina Owner: the owner of a small drinking establishment... and not just a drinking establishment. He is suspected of having ties to the Syndicate. Many good people have become alcoholics in his establishment.
Night Action - blocks another player's Night Action (the blocked player cannot be killed without revealing oneself to everyone). Turns an ordinary citizen and doctor into an alcoholic (loses previous abilities).
Status: bad

Drunkard: an unfortunate resident who has become an alcoholic in the cantina. Now he wanders around the city at night, begging.
Night Action - observes a player. Does not have his own home. Sees the murderer of the observed victim. Every night, there is a 25% chance that one of the drunkards will die.
Status: bad

Sympathizer: not everyone hates the Empire. There are those who are willing to inform on even their loved ones... or on whoever pays more.
Night Action - checks statuses, provides information (to a specific player). If he provides information to the Rebels or the Syndicate, his status becomes bad, and he becomes a member of that group.
Status: good

Citizen: an ordinary resident of a small town.
Status: good

Rebels:

Head of the Resistance Cell: a deeply undercover Rebel agent with an impeccable reputation, responsible for all the cell's actions, including propaganda.
Night Action - kills or blocks another player's Night Action (propaganda). An attempt to persuade an Officer results in his death.
Status: good

Resistance Fighter: a rank-and-file Rebel operative.
Night Action - kills.
Status: bad

Syndicate:

Syndicate Overseer: a person appointed by the all-powerful Syndicate as "responsible" for this territory. He has extensive sources of information, but he tries not to get his own hands dirty.
Night Action: checks status or, once every two nights, kills. If he kills, his status changes to bad.
Status: good

Raider: even the Syndicate needs to solve its problems with brute force, and that's where trained fighters come in, who don't care who they kill.
Night Action - kills. If he kills the Cantina Owner, he also kills the person whom the Cantina Owner blocked.
Status: bad

This is just a rough draft for now... for about 15 people.