OTC is heavily frowned upon by many of the clubs that I frequent (and often by the other girls - go figure). Generally, a girl that is caught leaving with a customer will take a lot of abuse and/or get fired.
For these reasons, many of the girls I have done OTC with have been careful about keeping it quiet. In a few instances the meetups have taken on a Mission Impossible-like quality, but even in less extreme instances usually involve staggered departure times, meet ups at buildings a few blocks away and/or directly at the hotel, and other mechanisms designed to hide it from the club.
Now this is great for me as I'm not exactly looking to advertise either, particularly as I go to some of these clubs fairly often. However, recently I have had a couple of incidents that were very irritating.
Instance 1: I go to a club in Queens where heavy ITC extras do not happen (cameras and strict club controls) and known OTC with a customer will get a girl in trouble. I just arrived at the club and had a girl sitting next to me. Moments later, a dancer that I've previously had OTC gets on stage for her set, spots me sitting with this girl, and yells over to her "I know him better than I know you" with a suggestive tilt to her voice. Then, just in case the girl didn't get it the first time, says the same thing again in an even louder voice. WTF? Thank you for sharing that with everyone on my side of the bar, the bartender and anyone else in the vicinity.
Instance 2: In a club in SC I have a girl that I take out fairly often. This is a club that is a bit looser in its views, but still a place where you will have a problem if it is too obvious. The last time I was in there, she spotted me at the bar, straddled be on my bar chair, reached down into my lap and announced "this cock is mine tonight" loud enough to be heard ny most of the people at the bar. WTF again.
The damned strange thing is that, in initially hooking up with both of these girls, they were careful in employing procedures to hide it from the clubs. What changed I can only guess, but I was not happy about my activities being publicized.
Leaves me to wonder if it is a sign of the times, with girls getting more aggressive as $$$ gets tighter.

