Although there was an (unavoidable) core of musicians and singers they were in no way "cliquey" - they were just the regular local attendees - others, whether singers, musicians or (shock horror) Joe Public were always welcomed.

That's how I prefer things, as far as welcoming people is concerned.

Some people have taken this so literally, going around the room in an unnatural and self-conscious procession.

This is where we differ, Martin, because I don't think it's "unnatural", just fair. As guru and jacqui have said above, some people don't like "jumping in" and so don't often get a chance. I don't really like doing it, either, but I would if I had to. I would have thought the "jumping in" would itself lead to friction, if two or more people try to compete to be heard.

GUEST,meself: I agree, I was a bit lazy earlier. I assumed the usual diplomatic approach (gently suggesting they keep quiet while others are singing/playing) would have been tried first. Of course I don't like rudeness (either being rude or being on the receiving end) any more than most people. Sorry if I gave the impression I'm one of those intolerant people who are rude at every opportunity.