Yeah, I'm new here. Actually, being pre-law, we covered this in one of my classes. It would be covered under the same principle as a business refusing to serve a customer wearing a shirt that pictured a nude woman. One has the right to refuse to serve an individual; one does not, under the CRA, have the right to refuse service to an entire race under Title II. If a black businessowner was refusing to serve all whites or vice versa, this obviously would be an entirely different issue.
So, the black businessowner/klansman example doesn't really hold water. And hypothetically, if it were my business (I'm a white male, FWIW), I'd throw the klansman out, by force if necessary, and it would be entirely legal. Klansman COULD try to sue me for racial discrimination, but I could point to two things, that I'm serving other white customers and that I am white also; the black businessman could point to the former). I'm not discriminating against him on racial, sexual, religious, ethnic, or any other grounds. I'm refusing to serve him because he is disrupting my business (for the purposes of my example, make it a fairly popular restaurant, with the klansman either in full klan regalia or make it a regularly-dressed "David Duke" klansman who is screaming "n*****" loudly). Legally, you have the right to remove such an individual who is making customers uncomfortable. Restaurants throw out unruly patrons all the time. The black businessman/klansman example would hold that a businessowner would never have the right to refuse service to anyone for any reason period.
Anyways, to make a general point, the CRA issue is hopefully dead. Rand's stopped talking about it, so should we. There's no satisfactory way of explaining Rand's point to the MSM/NBC. Any other debate of this is purely philosophical. Stop worrying about hardened voters that'll never back RP anyways, focus on the soft-leaning voters who already support RP but need reinforcement after the last week.