Not sure where to start with this question.
Just because escorts may use a hotel you are in on occasion, you can't discover them or book them in any reasonable way.
If you want to find a near by escort to visit her in her room, then yes, go on Adultwork, put in post code and zero miles. Of course, she may have a near by flat and not be in a hotel at all. if you want a nearby escort to come to your room, just book an outcall from AW or an agency.