10PM is the magic line after which the crazy times begin. Somewhere, a switch is flipped and it’s down the rabbit hole we go.
Still, I would just judge people based on what I see. It’s pretty easy to just politely say you have no rooms available if they look skeevy or nutty. It’s easy to tell, and some people have a perfectly good reason to be caught out and need a room. Now we did have pay-up-front policy for walk-ins in the evening. It just doesn’t make sense to me to have your policy that rigid, as a hotel you should really want guests!
Anyway, it’s a stupid policy from the get go. It’s the hip looking business men who were booked in by their secretary weeks in advance who snort coke, shit in the bath and smuggle in prostitutes. This kind of stuff is just a given in the hotel business.