Do you have a Planet Fitness anywhere near you? I loved that gym. They don't allow grunting when lifting weights, slamming or dropping weights and making noise, and most importantly, they do NOT tolorate any kind of bullying. Membership is revoked if its reported or seen.

Oh wow. I'm so sorry you've had this experience.

My experience, having stuck it out now for over a year going from the new fat person to the skinny regular, has been that everyone is really friendly, but the ones' with a goal are the most determined. Also, all those skinny people I used to think were "all that" are really incredibly friendly and seem like they're "all that" because they know everyone. And a lot of those skinny people have been there a long time and used to have some weight on them themselves. They've been through it all.

Being on the opposite end now, I can say that I go out of my way to give an extra big smile to the newcomers, and especially the obese newcomers. More often than not I get a scowl. I don't know what they're thinking about my intentions, but it's in my heart to be encouraging.

The gym is for everyone and anyone who doesn't think so isn't worth my time.

I saw something similar at my YMCA. There were giggles and snickering behind hands and puffed up cheeks at a gentleman who needs to lose a pretty good chunk of weight.
The rude *** perpetrators were 2 older teen girls. The dude just smiled and waved at them. They were shamed and he was awesome.
He is one of my role models