Desi and others, I completely agree that a group having sung individually should not then expect to perform as a group as well. That would obviously be unfair, but GF, I don't care if there are 500 waiting to sing if these people want to sing individually and it's their turn the FAIR practice is to allow that.

I've been running singarounds and MCing concerts (and performing) at festivals for nearly 50 years and I've always tried very hard to be as fair as possible.