The new Hard Rock in Atlantic City is great! There are plenty of restaurants, nightlife, and entertainment. Besides shows and concerts, the lobby bar lounge and hard rock cafe also have live music. The entire place is stunningly beautiful and there's great pieces of memorabilia all around. The location is great if you have kids, as the steel pier is right across the boardwalk.
Stay the day at a beautiful resort and enjoy all the amenities it has to offer!