/jp/ - Otaku Culture

where are my linguist sirs at?
what does the sign imply?

according to deepL the customer is not allowed to have sex with the girls? but istnt this like the whole point of these places? I'm confused. Or do you have to pay 800k Yen?

text for translation in case you its to small:
本番行為が発覚した際
罰金 800,000円 頂きます。
ルールを守って遊びましょう。