They're keeping an eye on who comes and goes. Was asked if I had a room card. Said I was just visiting a friend, got asked the room number and got a telling off and warned that they and the guards were monitoring the back door. An obvious attempt to scare me, as technically I'd done nothing wrong. I rang "my friend" back and let her know. But, clients and escorts alike be aware of this!!
Edit: PM for the name of the hotel