First time we played to a full Marquee Club was pretty good...
But in terms of "Kwality", my old improvisational jazz band once decided to do a live thing on the roof of the studio the guitarist lived in in Shoreditch. While we didn't have any songs and everything was improvised we had the (possible!) advantage that the drummer and I had played probably 300+ gigs together with our other band, and he was proper funky. So we started playing - simple funky groove, occasionally slapped and occasionally Bootsy-wah-bass, with African percussion, Marc Ribot-a-like guitar and horn players who also played with Lol Coxhill (i.e. crazy every note possible). And before the Police turned up 4 hours later to stop us there were a hundred or so people dancing in front of the pub below (Bricklayer's Arms), windows opposite were lined with people hitting congas, tambourines and nobody threw anything at us!