It's Always Sunny in Philadelphia - Season 13, Episode 10: Soundtracks

At Pookie's, Mac and Frank watch a drag queen perform. Frank tries to talk to Mac about coming out to Luther so that he can be Paddy's float's prize guy at the Gay Pride Parade.

Mac finally comes out to Luther, and then proceeds to entertain the inmates with a special dance. Luther angrily leaves in the middle of the performance after he was not happy that his son is gay.

The dancer comforts Mac while the inmates and a surprised Frank give the performance a standing ovation. Credits begin.