Childish, maybe, but nursery rhymes are as much a part of our folk heritage as, say, the Child Ballads (hah!).

Seriously, though, I agree that expecting grown-ups to join in without a very good reason is often inappropriate, but I sometimes do one if there are young children in the audience, as it helps them to feel involved. But I try to choose one that will amuse the adults, too, such as 'Okki-tokki-unga'.

No, you're not a 'killjoy'; if anything, those singers are more guilty, as they're wasting time which someone else could make better use of.

I suppose it's all down to why we go to folk clubs.