I have my bill before I asked for it...

Ferryman's Tavern, a place where it always is a good place to be, but Saturday evening when me and my girlfriend went there for drinks but it only ended up to be one drink. I waited twenty minutes for a waiter. And then finally we could place our order, I ordered a drink. When I was halfway with my drink, the waitress brought the bill but left. I while later she brought the card machine and asked me to pay, I asked her why she forced me to pay and her response was that somebody told her that I wanted to pay, she said that she didn't remember who it was. I paid for it but left drinking one drink... I really liked the place but now I feel like I don't want to go there anymore but that type of attitude from the waitress I don't want.