It's Always Sunny in Philadelphia: Season 3, Episode 7

3 - 7: The Gang Sells Out

The gang agrees to sell Paddy's after getting an offer that's too good to turn down. Problem is, Dee and Charlie, who aren't partners, must get real jobs. Members of Frank's "gang," the Yellow Jacket Boys, are played by members of the doo-wop group The Mighty Echoes, who perform.