The new must-have hotel amenity this winter?The skating rink. In Paris, the Hôtel Plaza Athénée (33-1/53-67-66-65; freezes its courtyard and invites guests to borrow red skates and mittens. Boston’s Charles Hotel (617/864-1200; has a 2,900-square-foot just rink steps from Harvard Square. And at San Diego’s Hotel del Coronado (800/468-3533;, shown above, the seaside oval is filled with Sasha Cohen imitators practicing their moves under the stars—and palm trees.