Shorted by two dancers

Stopped back at Bristol for the first time in awhile. Stopped on a Friday afternoon. Not much has changed. It is a typical rural bar with two stages although I can't remember the last time I saw a girl on either during a daytime visit. It was shortly after noon when they opened and I bought a cheap beer from the pretty bartender. I think it was four or five dollars. I was surprised that there were already four or five girls out at the bar right away it usuallu takes awhile for them to come out from the back. I got one 20 buck dance from a pretty black girl who was very friendly. The dance was good, but she started in the middle of a song and when it was done she stopped and said that's all. If she hadn't shorted me, I would have asked for a half hour. I headed back to the bar to chat with someone else. Met a pretty white girl with a nice body and askked for a dance. Her dance was great so I asked to spend a half hour with her. It was 100 bucks for the time. The nice dance continued, but then her phone timer went off after 20 minutes and she said "Give me a hug, that was fun." I knew it had been only 20 minutes so I said "what about the rest?" because the bouncer usually lets dancers know when the time is up. She said he isn't usually paying attention so she sets her own timer. I know it had only been 20 minutes because I checked my watch when we started. But I didn't want a fight. So I got up and left. She asked for a tip and I laughed. Frustrating to get ripped off like that when I am a generous guy and a good tipper. With the double shorting I hope this isn't a pattern.