I think there were more Iranian companies there, I see, so they even had Iranian instruments in London, interesting! :)

While we were there, I think it was a busy hour, but later at night, they even had some famous artists performing on their stage. Unfortunately, I missed that part, and I think they might have a similar rule about giving people a break from the noise.

Especially the percussive parts really needed to be managed, and I agree with you.