[TOMT] [SONG] From a skit on SNL with Bill Hader Will Ferrell

Bill Hader and someone else were sitting drinking in a booth and I think Will was singing a tune from the 70"s or early 80's. The entire cast ends up on stage singing and then exits the scene except for Bill and his drinking partner who are in the booth throughout. Might have been a season ender.

I would like to know what song that was, and if possible a link the video. All my searches have been fruitless.