I don't often agree with Shambles, but in this case I must. Singers (and instrumentalists) should be aware of the "feel" of the event.

I very rarely attend tune sessions, and would never dream of singing in one (unless invited to). I have been to plenty mixed sessions where singers and instrumentalists happily co-exist and listen attentively to each other. But at too many of them one side or the other decides they want to talk noisily while the "other lot" are performing.

Shambles asked why the singers didn't go to the places provided. The simple answer is that a few places were provided between noon & 2pm and after 11pm. These were usually oversubscribed but between 2 and 11pm the places provided were mostly in Chester, Cleethorpes, etc.