I live in Oregon...and NOT (THANK GOD) in Portland. Look up the “black” population of the state. That said I believe ALL people like to spend time with like minded people.
As far as Oregon goes, I grew up in Coos County—it doesn’t get much whiter than that. At my high school in the mid-80’s we had 2 black kids (out of over a 1000). I never heard of them having any problems fitting in—but their numbers were so small that there was no question of a sub-culture.