it's perfectly well within their rights to have a different prom party.... shit, the deep deep south still has places where you have to enter through the back door and eat in a seperate "Colored Only" area.... (shit, thats if they even decide to SERVE you)
Racism is all over, and there's still extreme shit going on that no one ever speaks on. And thats because the authorities, all the way up to the Govenors themselves are racist. So why would they outlaw that sort of shit anyway?