These are why Germany is nicknamed the Europe’s Bordello. Striptease and erotic clubs in Düsseldorf fall into a few categories. Of course you have the regular strip clubs with girls working the pole, lap dancing, private sessions in VIP rooms; all that jazz.
And then you have of course the famous German FKK’s such as Ocean’s (https://fkk-oceans.de/) at Oberhausener Str. 17, or Dolce Vita (https://dolce-vita.com/) at Briedestraße 44 are enormous sex clubs, often with spa facilities. You pay an entrance fee of €50 and you can spend an entire day inside. The girls usually also pay a fee like that. So they’re not “employed” by the FKK and they charge for their services individually.
The only rule is that you wear a bathrobe and the girls wear their birthday suits. You can spend an entire day in a FKK sauna club and not even have sex, you can chill at the bar sipping on a beer. You can relax in a pool or a jacuzzi, accompanied by beautiful women. You can even have a delicious dinner while watching a striptease show. All that in one place. I don’t think anyone does it better than the Germans.