"My answers to the above things that involve public indoor spaces are also predicated on how crowded it is."

Yes, this. I'm not totally *happy* about getting the train to commute to work, mind - I don't mind leisure so much because that way I can choose quieter times to travel - and I'll skip shops, restaurants etc if they look too full. The reason I feel uneasy about theatre/cinema is you can't really tell in advance how crowded they are. I'm not sure how logical any of this is, but risk behaviour rarely is, IME.

Also, although I have said I would in theory do most things, I have only started doing so in the last month, and am in practice doing them very, very infrequently, if at all.