Sorry greenword, I disagree. Everybody should have their chance and to talk over a singer is rude period. If a song is not going to well, a singer is likely to sense that and might not do that one again and let's be fair in most cases (unless you are looking at something like Tamlin) even if a person is doing a song you don't like, it is only going to last for a couple of minutes.

I suppose that there are occasions when somebody might need to be told that a song is not appropriate for one reason or other and that could be done politely.

The only time I have had a word with somebody over a song was a long while ago when I was one of the organisers of a local folk club. One regular singer frequently used to do his "breast feeding" song (It had a chours Suck you bugger suck... cause if you blow, I'll break your bleedin kneck - and the poor old wet nurse end up blowing up like a ballon and floating off into the sky).

It was one of those songs that had half the audience in fits of laughter and the other half (my mother included) in fits of rage so I eventually asked him to conider leaving this song out suggesting that as he had so many that were amusing to everybody, it seemed silly to do one that was enraging some. The singer did agree with my suggestion and left that particular one out from then on.

Jon