My point was that in that hotel (and in numerous other establishments in my experience) African Americans tend to patronize their own. They are not unique seen it with Vietnamese and other groups.
However, it does not seem to be a factor with whites.
Why do they do that? I guess I don’t get why we are still talking in terms of “their own.” Who is continuing to foster the separatist identity here, since, as you pointed out, whites do not go out of their way to patronize “their own”? Is this a good thing or a bad thing?