Got to a local "free" jam session in an artsy underground club. Half of them play avant-garde, half noise rock. Most are not sure what the difference is. Most feel great by not being constrained by following the rules or having the skills of playing the instruments. Cute on a good day.
Go to a jazz jam where non-pros are not afraid to go. Still usually a downer for the listener. However, they all know they suck.