Blackroom 1

You go to the door marked "Blackroom 1", and press down the door handle. The next room is... bright?

This room was actually lit, with a bench at the end of the room and lockers. A changing room, then.

You undress and put your clothes in the locker with the number "3". This is also the only locker you can open here. Apparently, everyone has their own.

You walk stark naked to the other door and push down the door handle. But instead of the door opening, an AI's voice sounds from the speakers:

"Interstitial room currently occupied. We ask you to wait a moment. Thank you."

Great.

But it also makes sense that you only let one in at a time and also let only one out. That way, guests don't run into each other and anonymity is completely preserved.

But shortly after, the AI's voice sounds again:

"Interstitial room is now open. We wish you a pleasant stay, Mr. Doe."

You walk into the interstitial space. The light here is now much dimmer than in the room before. The door to the locker room slams shut behind you and you hear the door lock. Now the light is also dimmed more and more, similar to the beginning of the show in the cinema, only that you are standing in a completely dark room at the end. The door in front of you is a sliding door that automatically moves to the side. Without seeing anything, you simply take one step after the other and feel your way forward until you suddenly feel soft ground and the sliding door closes again behind you.