I think the idea of a critics group( or night ) a very interesting one. There are so many things you could say but don't like to
- you're never ready
- you may be the organiser but taking every third spot is not really on
-excluding those not in the ' in crowd'
- over long songs/ tunes that no one else knows
- eating crisps too loudly
- going to the bar in the middle of someone else playing/ singing
- arriving late and expecting to be given an immediate spot

Then there are all the musical things.

perhaps its better just to air the comments here.
FloraG