I was going to mention the heuchs as well. I remember being at a concert in the early days of a particular Scottish band, and one of the lead players telling the audience that they should heuch, then demonstrating how to, followed by having a trial run of heuching from the audience! One of our respected older musicians in the audience muttered that he knew perfectly well how to heuch, but would only do it if he felt the music deserved it: he didn’t need to be told how or when!

As for crowd order, it often goes with the seating, or lack of it. You get much more chat if the audience is set out cabaret style with small tables and chairs around them, as compared with straight rows theatre-style. And the most disorderly and disrespectful audiences are often those where it’s standing room only - screaming at each other over the music, waving phones in the air, up on shoulders, crowd-surfing, etc.,

And one of my pet hates relates to performances such as ballet, opera, musicals, where there is this thing at the start called the OVERTURE, which some people seem to think is for them to talk over: no, it’s an integral part of the whole thing and should be listened to, just as much as any other part of it.