Some places do it in big cities or where there is a high black population. I know us (including me) black folk dont like to tip the whitey much.
j/k I'm way over that. I've seen it more and more lately. We were in a upscale (all white) bar for the Super Bowl and I was with all white friends all in out late 30s to mid 40s. The tip was added to our bill. There loss though, because I normally tip way beyond 20% By doing so the waitress losses money.