Photo: Patrick McElhenney/FX

Although they’ve kept the bad behavior going for 12 seasons now, eventually the party will have to end for the gang on It’s Always Sunny In Philadelphia. But not for Charlie Day, Rob McElhenney, and Glenn Howerton, who are graduating from basic cable to network after selling a new sitcom to FX parent network Fox. Called The Cool Kids, the show has sort of a Golden Girls-meets-Mean Girls feel, centering on a group of guy friends who are the party kings of their retirement home until the arrival of a new resident, “a female rebel who’s ready to challenge their place.” (That description comes courtesy of Deadline.) Kevin Abbott, who recently shepherded Reba and Last Man Standing to the safety of syndication, is in talks to serve as showrunner. The show is one of two retirement-home sitcoms currently in development; the other, a Norman Lear passion project called Guess Who Died, just landed at NBC.