So as a joke, I said to them, "你为什么要欺负美国人？

I wouldn't joke around in that place. They want you to lose it so they can throw your ass out onto the street. I saw one british guy get turfed out in that place because he went into a rage, and I had to bite my lip in there on one occasion.

If it is the same place that I think you are on about.

cheers and cafe latte supremos,
IM