Depends on the number of singers/players, a group of 8 has a different dinamic from a croud of 20. I much prefer singing sessions, 12 - 15 performers is about right especialy if there are some ballad singers. The perverse notion that every guitar string must be tightened/loosened/changed or tested before playing is a session killer, likewise the unasked for playing allong with a singer. Not to mention or to tollerated the dreaded BOOK of song words. If the singer can't be bothered to learn the words why? should anyone be bothered to listen to them.