Captain Birdseye

stop being obtuse,you   know very well,that many clubs in the past[and some still are] run/financed by one person.

Fine, but what has that got to do with our policy at the Lewes Arms?

the singer on one of these threads who had listened to herself,and realised she was going quarter tone sharp,by the end of the song, had the right idea,critical analysis of her performance.

Just so. The sternest critic of a performer is the performer themselves. As Ewan MacColl said in Jim's quote earlier -

Anybody who's ever tried to sing and got up in front of an audience and made a bloody mess of it knows that you're not enjoying it when you're making a balls of it, but you are enjoying it when it's working, when all the things you want to happen are happening.

It's up to the performer themselves to raise their standard. The drive has to come from within not from somebody telling them they aren't good enough.