Name of Gang (If it has one): Joker's Goons
Gang leader: Joker
Notable gang members: Harley Quinn, Man-Bat, Clayface
Headquarters: 
Enemies (If any): Unknown
Allies (If any): Unknown
History: Unknown
Other: Harley is his plaything and he keep Man-Bat around to remind him of his old Archenemy. Clayface needed a job and who better to play then the Crown-Prince of Crime while he's away.