One good rule some groups have is to not follow a regular song with a parody of it.

I think we are far too polite in some of these situations and not forthright enough about our preferences. There are situations I want to avoid on the very few per year musical events I can attend.generally a music camp or two. I don't want the blue books, I don't want the long dreary solo songs, I don't want silly songs or parodies. So I try to be very honest now at camps etc...at such and such a time some of us will be in such and such a place (and not hiding in some obscure building) doing this sort of stuff. We won't go around in a circle and it is survival of the fittest. We won't chit chat and we won't turn to a page in a book at anyone's request. Sometimes you get the best music of a weekend that way, sometimes no one comes at all, but it is based on honesty as opposed to being polite and then sneaking away with like-minded people. And I am definitely in the chorus in these situations and not a leader in any way. mg