Re Jim C's bits on singing in pubs. I mostly agree with him. Purely froma personal view, I often sing acoustically in my local pub in Stoke, but there is only a tiny fraction of the songs I know that I feel easy singing there. On the hand, really late at night with a lock-in in obscure island bars..this can change!
No rules are absolute: May Bradley's "Leaves oif Life" was recorded in Ludlow pub I believe, not what we wouyld mostly think of as pub fare. But then, May Bradley, like Margaret Barry, could make anybody listen to what she was at.