Yeah, pretty much Phil Collins gets it, but -2 because people being obnoxiously loud on the train/bus is fucking annoying. On the other hand, +1 for not listening to an ipod, singing out of key and gesturing.
This is what college a capella groups aspire to. They don't all get there though.
They are called Naturally 7.
From what I've heard The Felice Brothers spent a bit of time in NYC subway stations. Busking is like woodshedding...either you become an amazing musician or you die. Unless you're one of those trust fund buskers.