You do realise that real ordinary non-sex industry people use hotels to meet other people to have sex. It's probably a good money maker for the hotel industry. It's only the wrong uns that they want to stop, so don't look like a wrong un.
Be discreet, don't stand out, look normal (I know this bit can be hard), look like a regular hotel guest (the staff don't know all the guests in their 100s room hotel by sight) and don't run or speed walk to the lift, say hi to staff if they say hi to you. If challenged just say you're visiting a friend or work colleague (you are) and don't cause any drama on the way in or out. You'll be fine.
I'm well aware of people using hotels for sex but you don't seem to quite get it

For instance there a hotel in Preston that i've punted in numerous times over the years, currently it's great for punting as you can simply walk into the entrance from the road / car park and you're straight into the lift, reception is on the 1st floor but currently you can go all the way from the ground floor right up to the floor with the whore without any worry of being challenged by anyone
I believe there is however a restriction in that at 10pm the lift only goes up to the 1st floor and basically the doors open so you then have to exit the lift and step out of it at which point you are face to face with reception and risk if it's quiet "Hello sit how can I help you"

You may not get challenged or you may be able to keep cool and blag it but most people don't / won't want the potential agro

Now imagine after all these incidents they have a review on customer safety and someone sits there and says i'm not sure we should be letting anyone / everyone gain access to the rooms without coming through reception and they permanently change it to be like the after 10pm scenario
As for only wanting to stop the wrong uns so don't look like one i'm sure there are plenty of dodgy people who don't look dodgy