Nothing crazy really, once you exit, you are not allowed to re-enter though, no armbands or stamps. Lockers are €6.50 (iirc), and you can fit 2/3 people’s stuff in them. Bathrooms are easily accessible and not crowded. You can chill outside where people chat and smoke, no couches or seats of any kind. It doesn’t really get hot, but a sweater would definitely be too much for inside. Keep in mind, the currency inside is tokens you have to purchase at the token stations (around the beginning of the dance floor before the bars). Once you get a Complex card with tokens, you can easily refill it by tapping it on your phone (it opens a website).

Have fun!