Anybody would think the spectacle was for the performer rather than those listening...

That said, if you must join in, you become part of said performance, so yeah, best if invited and follow the leader rather than your own interpretation.

I have a relaxed attitude, but there are some songs which I perform in concerts but never in folk clubs, as my versions may, (and tend to..) string out the end of a stanza with a flourish, so whilst I am taking my breath waiting, others are playing or singing into the next verse or chorus. The upshot? "Mather got his song wrong..."

Whilst we are having a good bloody whinge, the next person who says I "sing it wrong" will be first up against the wall when I come to power.

Oh, there's a debate... Is porn better than sex? Can we take age, description of partner and our ability to perform into account????