I wouldn't worry about which hotel I'd choose for a punt as long as it's big and busy there's no real need for it to be punter friendly, people should always be coming and going so it'll be very anonymous.
It's WGs that have to worry about getting multiple clients up to their room, no single guy should have any issue getting a woman up to his room unless the WG is known to the staff. If she can't get up to your room cause there's say keycard access in the lifts then simple meet her and take her up.
But you'll get no hotel names as that practice is frowned upon.