Patrons and employees at my local W-M are predominately white (Very close to 100%). It's the same in the town where I live.
I know, I know, all this means is, that I'm racist.
You could walk me into any Walmart after closing time, and not knowing anything about the location,
I could tell you the primary demographic that works at and frequents the store
by the neatness and completeness of the stocked shelves.