Everything in that article is true except for this line: "The study, published in the Journal of Black Studies, found that 40 percent of waiters admit they discriminate against black customers because of a perception they don't tip as much as white patrons, according to the Daily Mail."
It's not a perception, it's a fact. Blacks are the worst tippers out of all races. I waited and bartended for about 5 years, and blacks were by far the worst tippers. I would give them the best service possible, so there would be no excuse for a shitty tip, and they would still tip shitty. There was a black guy that waited tables with me, and I told him he needed to talk to his people and get them to start fucking tipping. He said, "Shit, I don't tip either when I go out to eat!" I said, "What the fuck do you mean, you wait tables and you don't tip other waiters?" He said, "Yep, that's just mo party money, and mo drink money for me." His name was Rob, and he was a sorry mother fucker.
Bottom line is, it doesn't matter how stellar your service is towards blacks, 95% of them are terrible tippers.