I don't think gyms should close. Lots of people gained weight during quarantine. Also, being in good shape helps your immunity. That's one area where I think the cure is worse than the disease. Members should forced to maintain strict social distancing and wipe down their equipment after use. And the gyms should be thoroughly cleaned every day.
1) There are other ways to exercise without going to a gym
2) You can lose weight by watching your diet
3) In case you haven’t heard, there is no “immunity” to this yet. Perfectly otherwise healthy people have died.
4) In case you haven’t noticed by now, a not so insignificant number of Americans cannot be trusted to do the right thing.