All I can say it just pretend like you belong there. Don't sit on your phone in the parking lot. I tend to say "I'm here" about 2minutes till I get there. Most SP's will say they need a extra 5 to clean up (or slap on some lipstick and perfume or do a bump or take a hit lol. Then wait for reply, pull in, park and tell her your on the way in when you hit the elevator and you should be good.
Thing is, don't linger. Pop in, pop out, simple. Unless you are caught in the act your really not going to get in trouble. Last cop that bothered me asked if I was there to see a pro. I said no, I'm here for a buddy's bachelor party and to stay here over night after we all go out. It was a dive of a place and the cop said "Here?!" lol I replied, yeah it's cheap but we just need a place to crash after, no drinking and driving you know. "Well this place has a lot of prostitute complaints in it, you sure you guys aren't using one?" Not to my knowledge, and not before his wedding. But hey, fun is fun and I don't think I need to tell you
" He laughed.
Some cops are cool I think most not only look out of the business but for the "element" the girls attract. Just be cool, don't be a dick and don't pull the (I know my rights!) shit, and you can have fun and leave later or just decide to hit up another place.
Sadly Durham lacks in the quality department so I suggest hitting the 407 and trying out a Markham girl or Richmond Hill. Non asian of course, they are typically all fakes.