On South Carolina's Blue Laws

If South Carolina's "Blue Laws" haven't managed to keep people from drinking irresponsibly, they have at least helped endow the state's alcoholics with better foresight than those in neighboring states..... To buy anything beyond wine and beer, you'll need to visit a package store (a.k.a. "ABC", a.k.a. "red dot" store), where sales are permitted Mon.-Sat. 9 AM-7 PM.

You'll notice that the stores do not have the word "alcohol" or "liquor" displayed on the outside; they are marked only with a red dot, or perhaps three red dots, usually approximating the size of pizzas. This way, the thinking goes, only people in the know will frequent the stores. The policy also ensures that the illiterate can find booze.--from Moon Handbooks: South Carolina.