I bought my 4Runner from a black dude at the dealership. Grizzly old man with a shit-ton of common sense and patience. I picked him from the lineup because he didn't look like a tail-wagging, drooling douche ready to pounce.
And I'll be honest - if I went somewhere where only 10% of the staff was white, I might seek out the white dudes, thinking I might be able to relate better to then. Depends (Undergarments) on the type of place though.
Also, I purposely seek out females at restaurants, regardless of ethnicity. I hate it when a frickin' dude brings me my food.