I moved around a lot growing up. Until I was 10 or so, I lived in almost all-white small towns. Then we moved to NC. My neighborhood was white, although my school was mostly black. But for the first time I knew a fair number of Jewish kids. Then we moved to Oregon ... almost all white where I was at (it used to be a sundown town) except for a growing Hispanic population. But there was only one Asian girl, no black kids, and no Jewish kids at my high school. Off to college in Cleveland, which was relatively diverse ... now I'm here in Seattle. My neighborhood is very diverse - I live next door to the high school and it is full of kids of all colors.
But still ... I go to work and my office is almost all white. Now, there are a lot of Asians and Hispanics in particular working here, but they are not in the office.
However, one thing I do have to say about Seattle; there is a lot more interracial dating here than anywhere else I've lived. I'm sure we have a very long way to go in regards to race relations, but Seattle is better than anywhere else I've lived. NC was diverse, but we didn't mingle.