WaPo: Three quarters of whites don’t have any non-white friends. Not a surprise.
An easy rule of thumb to determine if someone besides really has friends from other cultures and ethnicities: check the photos from their graduations, wedding parties (not just weddings), baby showers & kids birthdays, holidays, religious rituals and family funerals. Real friends will be present in a bunch of those photos over the years*.
*Employees and servants don’t count.