You don't have to exercise to stay here. But you will be sorely tempted to do so, because guests at this lodge are allowed to partake in the dozens of fitness classes offered each day. Some of the country's top experts in exercise science teach here. You also may find yourself eating better while at Cooper: The in-room fridges are filled with healthy snacks and a calorie-conscious (but delicious) breakfast is part of the nightly price. The rooms are quite comfy: filled with dignified, colonial-style furnishings and plush bedding. And if you do get inspired by all of the joggers running around this tree-filled campus, all the better.