The scene just when Aya realizes that she is locked in a room and is unable to escape; Luca says 'The door can only be locked/unlocked with a key, sweetheart. Kinda logical when you think about it. Don't want a bunch of kids lockin' themselves in and havin' sex like animals.' That's true, so why have the lock in the first place? It's a violation of fire code.
There is very little logical about staff (or anyone with the key) being able to lock patrons in rooms via key, or any other tool. A fire marshal would likely shut this club down till it's fixed. Heck, there is code on the height limits in witch locks' point of operation need to be within. Preventing egress is all that lock's functionally does, endangering lives. Luca's reasoning would not win over in a fire code inspection.
There is the criminal element of the story, but the way Luca words it, 'Kinda logical' seems to indicate that he thinks that it's normal. This time Aya wanted to leave due to trying to avoid getting raped, another reason to have no locks, but if it where a fire alarm going off, what then? Making less logical sense?
Don't get me wrong the scene is great, just a little rewrite of what Luca said and work it in would fix the scene. Keep in mind these doors and any lock on them would be inspected, not everyday mind you, so something could potentially slip by. The door would still need to be locked due to Aya's position during her magic dicking to the stars. Wouldn't want that changed even if it could be, Aya artwork is soo good.
Edit; I did want to mention I'm not an expert on the matter.