It's been a while since I've been to a live gig that wasn't essentially in an arts centre. I'd forgotten how much London gig crowds are essentially an assemblage of colossal assholes.
In any London gig about one-third of the people are there to score drugs, one-third are there to meet friends and socialise and one-third are there because of, you know, those people on the stage.
You have to play pretty loud in London, because if you don't then half the audience will be talking loud enough to drown you out.
It reminds me of descriptions of Regency pleasure gardens and Sadlers Wells in the same period. Sure you have to have some entertainment to hang all this stuff off but really your just out to see people and be seen.