What's with the curtains in the back?

This was the closest club on my day out for club hopping. That didn't happen due to other events. Anyway I wasn't as prepared as I should have been by reading about parking. I probably spent 30 minutes circling several blocks. Afternoon is impossible for street parking in the area, I finally parked about 3 blocks away only to see (duh!) they had a parking lot practically empty. Oh well! Upon entry it looked much better inside than I expected. As others have stated this neighborhood doesn't look the best. The music, atmoshere, lighting were all quite nice. It was clean as well. Frankly all the ladies looked similar, mid 30s MILF, latina, decent body, OK face. I took the second one that approached me in the back. I don't know if it's day shift, her specifically, or me but I was surprised at the low mileage she gave. I expected much more. The curtains were tied up so all mirrors were visible to the front. Another customer was at the other end of the couch looking like he was having a good time. I tried some groping but she would only allow a short, quick look and touch of her tits. Top and bottom both stayed on. She said they could see what we were doing, no kidding! I took a second dance with no improvement. She was friendly enough and pleasant with the grinding. If I get back in the area I'll try again. I suspect I just missed out for some reason but others have obviously had a good time. Are the curtains supposed to stay up on day shift?