Based on the fact that your last review was on May 29th and was about the Harem in Dayton, let's start there. The Harem in Dayton will get overcrowded at night with customers and will especially get overcrowded on weekends. If you are just waiting to be approach then that is the worst approach.
For starts, make sure you stage tip girls you are interested in and preferably multiple times in the stage routine. If you want her to approach you after her stage show then don't just stand there as she dances in front of you on stage. Introduce yourself, tell her you find her attractive and ask her if you can buy her a drink. These are standard approach methods, but they play an important role. Tipping on stage makes you stand out in the sausage fest of guys and at least shows the girls that you have money and are not just there to sit around for a free show. Offering to buy her a drink is a positive offer for a dancer who has had a busy night.
The last time I was at the Harem, dancer drinks didn't cost more than normal drinks. This will give the girl a chance to take a break and relax over a drink. It will also give you a chance to stand out at the bar and will show girls even more that you are paying customer and at a minimum will show that you are a prospect for drinks and possible relaxation. At the Harem, the best place to sit if you want to snag a dancer that you're interested in are the seats a long the back wall near the lapdance room. If you take the dancer that you bought the drink for back to the tables closest to the lapdance room then as dancers walk in and out, you can casual smile and make eye contact for a few seconds at them as they walk by and look away and back at the dancer that you are with.
After, the girl is done drinking then head back for a couple lapdances. While you are getting lapdances from the dancer you are with, occasionally look around in a non creepy way and smile and make eye contact for a few seconds at some of the dancers as they wrap up their dances with their customers or when they are facing you while they are dancing with their customers, but make sure that you give your current dancer noticeable attention too. After your dance is done with the girl you are with then you should have a better image as a spender.
Most girls who have regulars will stay close to their regulars, because they don't want to risk losing that regular to another dancer, but they'll also keep their options open to customers with potential to make them money. Also, a lot of regulars and their dancers have a mutual understanding that the girl has to circulate to make money. Dress for success. On a crowded weekend night at the Harem, it is all about building up a positive image and working the room at least initially and in much in the same, but opposite way that dancers do to customers. Joke, laugh, rinse and repeat.