Want to have a Wii bit of fun? Try Westin Hotels & Resorts, which is equipping some of its fitness centers with the sports-simulation consoles by Nintendo. So, instead of just hopping on an exercise bicycle or hoisting a weight or two, you can pretend you're tennis star Venus Williams, Yankee great Derek Jeter or any other of your athlete idols. Among 10 hotels adding the game this month in a pilot program: the Westin St. Francis in San Francisco and the Westin New York at Times Square.