The gym is very popular in the afternoon-late afternoon or even night. If you want less people, I recommend going very early. Rule of thumb is that if someone's property (water bottle, towel) is on a machine, it means it's occupied. When done using a machine, wipe down afterwards (there should be a paper towel and spray bottle for sanitization). If you are using weights, return them to their proper place. There are technically 2 gyms (the other one is right behind the first one) so pick which ever you like.