I prefer hotels these days and as I punt locally - within about 20 miles or so of home as I don't have time to spend ages driving around - I can hazard a pretty good guess at which hotel a girl is working from. If not I ask where it is when I first make contact, I've always been told the answer too.
I tend to avoid hotel with key card to get in and those where I have to park miles away, normally parking is pretty easy though. Beware that some hotels have limited parking, 2 hours or so, things may get tricky for those longer punts or overnights.
I've never had any problems with staff, just walked straight on in and through reception, purposefully and not loitering - don't want to look like I don't know where I'm going.
Personally I think the cheaper end of the hotel range - 30 ish quid for a room sort I'd guess - know exactly what is going on and they turn a blind eye, probably accounts for most of their business during the day and they need the paying guests. More expensive hotels in tourist trap areas are more likely to have issues, especially when the poor innocent holiday makers take offence and complain. I think one hotel nice and close to home has it all organised. Last time I visited one corridor had do not disturb signs on every door - must have put all the girls in that one area. Bit like the Pascha only with the doors closed.