I've said this before on other threads, but I think GOSBTS would work best when the music takes us so far but then is cut and the fans 'job' is to take on the chorus - that way you get the fans buy-in.
That is how West Ham do 'Bubbles' and it just works.
http://www.youtube.com/watch?v=-HvfVVPz9i8&feature=related
PG
Yes, except the fans would then sing it at 9 million miles an hour. Quite why 95% of the crowd seem to want to do this I've no idea, but they do.