I go to classes at a super small, private gym thing (so not a chain or anything, and I do mean super small).
They seem to have decided that they are a fitness provision, not a "gym" so they are still running classes and are open 
I'm naturally a bit of a rule follower and also can't attend anyway, I have vulnerable people in my family, but also I just think that it's so against the spirit of what we're trying to do here??
They've reduced their class sizes and made them 30 mins instead of 60 but otherwise basically going ahead as normal...
I don't want to "be a grass" but their attitude of "whatever, it doesnt apply to us, we are carrying on" is just really frustrating 