You actually can. There are tons of high end sex parties in every bigger city in Europe. Tons of beautiful people, everybody is open minded (usually you need to pass a written vibe test), Bars, DJs, Saunas, Swimmingpools, food and drinks, private rooms, public rooms and even afordable.
I assume all the beautiful celebrities are at least invited to the high-end sex cult orgies. Whether they participate or not is really just a matter of preference (ideally).
Outside of nepo-babies they probably didn't become celebrities without first participating and demonstrating willingness in the existing high-end cult orgies.