I personally haven't been in a situation like this, but I know a lot of people who have.
I had a friend work at a waterpark, and all the lifeguards would skinny dip after hours regularly, and of course they always changed together.
I worked retail after high school, and I found out a few years later that most of the cashiers had orgies with other departments a few times a year. It was super hush-hush, and I was never invited.
I did have a small inkling that it was happening, but I thought it was just an inside joke.
A friend of mine worked at a bookstore, and a lot of the women wore nothing but dresses of some type, and they set up chairs to sit in to read in during their breaks or when it was slow at the store, and they would often put one leg on the chair, intentionally giving people a look up their dresses as they walked by. They would tally for points for who got the most and longest stares.
I had a co-worker who previously worked retail, and he said that the women would all take off their bras during overnight stocking shifts; it started as a dare, then it just because a thing that they did.
Oh! There was one that I was at. An annual party for my ex-wife's retail store at a park, and they brought water balloons. Many women in white tank tops and thin summer dresses without bras, and many women got wet with their nips poking out and quite visible. They were all aware of it and joked about it, and not one of them was shy about encouraging people to look.
One of my friend's moms owned a small dress shop in a mall, and he said that his mom would get annoyed when women would like up to use the only fitting room; she would tell them that it's okay to just change in the store. Supposedly not a single one ever did, ha!
I guess my own work atmosphere counts. I have mentioned years ago that I am a pro musician...everything from lessons to gigs to anything in between. I posted before how a well-known person came to my house to buy some gear from me, and propositioned me and my wife to join her, and she showed up in a see through top. We didn't take her up on her offer.
I have also had adult students who were either totally clueless, or intentionally wore clothing to their lessons that revealed A LOT, and on a regular basis, too. I had posted about these before years ago as they happened.