Saw Music Man on last Wed, right before mandate lifted, and Wicked on Friday, first day not required. I wore my K95 mask both times. On Friday, I'd say that about 20% of the people in the orchestra section around me were wearing them. I did see some people who didn't wear them for the performance put them on when exiting when bunched up with people.
While I'm sure some of the ushers wished for the mandate to continue, I bet they don't miss having to explain to people that holding a bottle of water in your hand doesn't mean your mask stays off( she had to demonstrate taking a sip and putting mask back on) or that wearing it on your chin doesn't count.
I wear my mask while in a closed area, with a group of people I don't know, not at home. I even wear my mask until I get my food in a restaurant. At home, we usually eat at off times for lower crowds, didn't do that here on vacation, but that's the choices you make.
Found it interesting that they were still mandating masks at the Natural History Museum, where you can distance more than theater. I would have worn anyway, but surprisingly people were being good about it. Coming from Texas, it was nice. I still don't see how wearing a mask, absent some health issue, got to be an infringement of your rights for some people.