I used to belong to Planet Fitness. They had a gym close by my house, one close by law school and one by were I worked in law school. Really convenient. We could wear tanktops but what they did have was this siren like alarm and a blue spinning light on the wall, kinda like what an old school police light looked like.
Anyway, if you dropped a weight or grunted they would sound the alarm and, it was loud, causing everyone to stop and see what's going on.
Judgment free zone my ass. By doing the alarm thing they are judging. They attracted more attention to what was going on then the people working out.
They sounded the alarm on me once. I dropped a weight, not to be cool or anything, I was in the process of pulling my shoulder and trap and dropped the bar behind me. Thing is I was on a smith machine so the bar just dropped about two feet until it was caught on the rubber stoppers. When the alarm went off I was bullshit and let the kid at the desk know it.