I strongly prefer American strippers, so I'm having trouble remembering very many I've bought dances with. I assume we're talking about that. I've tipped or talked with too many to remember - especially Asian and Latina - without getting dances.
Most recently, at PP-Columbia, I've done Brazil and Russia. The Brazilian, although fun, was kind of skanky. The Russian was a very hot, thin 20-year-old blonde I'd had my eye on all day last spring, not suspecting she was anything exotic. She never went on stage, but I finally snagged her as she walked by. She told me she's lived in the US since her parents moved here from Siberia when she was a little girl. She's totally Americanized, talking like a Valley Girl with only a slight Russian accent on a few words, which was cute. I haven't seen her since then.
At Detroit clubs there are a lot of Russians and other Eastern European girls. Other than one Czech I recall at the Flight Club who was sweet, I've always avoided them. They usually come on too aggressively for me. There are also quite a few Middle Eastern girls. Of course, you don't always know whether a girl was born overseas or here to immigrant parents. One of my old faves was 100% Indian, looking like a Bollywood starlet, but was born in a Chicago suburb and talked and acted like a bohemian college kid.
Other than that, one or two other Eastern Europeans in Canadian clubs (plus French-Canadians, if that counts), and a Norwegian at Chez Paree in San Francisco years ago. There was one very memorable part-Chinese girl there, too, but I think she was US born.