Stephen Colbert on The Office as Broccoli Rob!

Ever since the character of Andy Bernard was first introduced on The Office, he made it clear that a cappella was a large part of his past.  Here's a clip from the first episode of season 3, Andy's first appearance, where he talks about his time at Cornell at his participation in their a capella group "Here Comes Treble":

As the seasons have progressed and we've gotten to know more about Andy, we've learned more about his time with "Here Comes Treble", and all of his fellow "Here Comes Treble" buddies.  In this season 5 episode, Andy tells his fiance Angela (remember when they used to be engaged?) that Here Comes Treble will be performing at their wedding, and that the whole gang will be staying over at their house.  Here he lists them all by their college nick names: