Talking about the all night concerts, I did some of the first all night concerts back in the 60's with this little harmonium, and I also had saxophone taped delays. ↗
We always got a strong response but I think in this day in age there is less of a marijuana fog at concerts and more of people just more naturally exuberant - it seems to me. ↗
I've looked at photographs of myself during concerts and it sometimes looks as if I'm in a fencing move, with a guitar in my hands instead of a sword. ↗