Yea it's a pretty absurd question. Especially in a city that's so diverse and there will be inevitably clients of all kinds
For the record, I'm not black or white (fwiw) and I've never had an issue with making connections with MPAs. Race actually rarely ever gets mentioned during sessions when I'm chatting with MPAs
As long as you show respect, be open minded as necessary, keep good hygiene, and be personable enough, then the MPA will be into you