>>76410344 (OP)No reason to be anxious, no one in a large commercial gym is going to give a shit. If you go long enough, you might even make friends.
If youโre that worried about it, just walk into a gym you donโt want to join. Usually you can get a day pass or something to try it out before you get a membership. Do that (just tell them you are traveling and need a place to work out for the day so they donโt bug you too much about joining if you want), see itโs no big deal, then sign up for the gym you do want to join.