I'd have a problem with that too - seeing is I don't even know who Rachel and Ross are.

If you can connect the banter about a song to someone in the audience or one of the bartenders - that's very cool. Gives them and the folks around them one more reason to listen carefully.

But relating it to a sitcom - not unless its playing on the TV's behind the bar while you're on stage and you really feel like you want to get the attention of those watching it. Otherwise, you just might be encouraging those wathcing you to watch the TV.

Marty my home

Experience is that marvelous thing that enables you to recognize a mistake when you make it again!