Don't shop where you cannot work

One of the discussions I continually hear is that Black people should spend more money with other Black people. The principle sounds great, but is very difficult to do in practice. Blacks, by many standards are extremely integrated into the US economy. Black also own very few establishments. I generally follow the principal of "Don't shop where you cannot work". In other words, if no one working in the store looks like me, I try not to shop there.