The best session I ever played in was at Beverley Festival many years ago. Many of the musicians were well-known names, many were guests at the festival, and the standard of playing was high but not too competitive - no one had anything to prove. People were playing unusual tunes as well as the old favourites, and others were picking up on them and playing interesting counter-melodies, rythms etc. The mood was laid back and mellow.

By the end of the afternoon the session was beginning to dwindle but still had "legs". Then a large fat bearded piano-accordion player walked in, announced in a loud voice that the session needed livening up a bit, and began blasting out tunes we'd already played, badly. Within minutes everyone else had packed up and left.