feeling a little ripped off

First time at a club, wanted to experience what this was all about. After reading some reviews and experiences online, I figured this one would be great as it was nearby and the ratings weren't that low. $20 cover charge to get in.The vibe was alright. Whole place seemed to be full of awkward introverts that looked like they were watching a piano recital... certainly not the active image I had in my mind from movies. Lighting and club layout was great though.

Got a coke and enjoyed some dancers (drinks are free, no alcohol). Seemed to be a good mix, mostly young. After a few mins, a young, good-looking latina sat next to me and started chatting. We spent about 5 mins before heading for a couch dance. She quoted me $30 for 1 song. Not sure if this was the average price since it's my first time, but I accepted (I forget her name). Some touching was allowed, top came slightly off, not much more than that.

After the dance I check my wallet and realize I only have 20s. I asked if she had change, she said "no". After some hesitation I said alright and handed her two 20s. She proceeds to put the bills in her purse, which I now see is full of 5s and 10s... LOL. Protip: always carry smaller bills.