Good - in a theatre pub in Angel. It was matinee time, so all of the audience had come down for a pint. After a while, one by one, each person that was standing near me started singing. It was a pretty surreal experience. I suppose that it wasn't that amazing to anyone that had been watching the play, but to me it was incredible. It ended with one of the actors dancing on the bar.
Bad - about 5 blokes dressed in black diner jackets, black trousers, white shirts and trainers - running up and down the millenium bridge, with earnest expressions, doing shit acrobatics.
Presumably promoting some kind of contemporary ballet.