Why are white girls less opened minded in Las Vegas?

I am Mexican of Spanish Asendence , I look more European than Mexican I have a fit body i dress nice , Armani, Puma etc , so when I lived in San Francisco many white girls wanted to go out with me, and many of them liked me because I was not the typical Mexican, many white girls came to me and talked to me but two years ago I moved to Las Vegas and here most white girls are not Interested at me, white girls don't even look at me ,they are not just interested in a guy like me , they only ones that are interest at me are the toustist that come from California, Why is that?