Does this gym actually enforce mask rules? Are people walking around during workouts with masks pulled down under their chin or nose?

Most everyone has been complying with mask rules. There's been one or two individuals in the months I've been going that tried to skirt the mask rules but staff did come to enforce the policy. The staff isnt patrolling the gym like they were in the summer but they will strictly enforce the rule if they see or hear about a violation.

I can't answer the first one beyond they check as you enter to make sure you're wearing a mask. I have not seen anyone wearing a mask under their chin or nose while I've been there. So I haven't seen anyone called out on that.