Folly Beach (AKA The Edge of America) is about 20 miles outside of Charleston. There's not much to do there (besides going on the beach) but there are several little resturants in Folly Beach. As in terms of hotels, the most popular one is the Holiday Inn. Most people who visit there go to visit Charleston and the sites (The Battery, Waterfront Park, Aquarium, The Market, historic homes, etc).
PM me if you need more info.