You have to know exactly what you're doing when you call something racist. Most of the time it's just poor service. It has nothing to do with race. A number of industry observers believe that poor service plays a more prominent role than outright discrimination. The Texas Restaurant Association hears anecdotal evidence of complaints on occasion but believes racism a rarity in Texas eating establishments.
Every customer is essential to the prosperity of the restaurant regardless of their race.
In other words, it would be financially stupid for managers or staff to discriminate. Ah, the curative power of the almighty dollar. When times are good, racism fades into the background, rearing up only in occasional and ill-defined anecdotes. At restaurants at least. At other places, definitely yes.