Hotels that rent rooms by the hour are generally frowned upon by the mommy-and-me set. Which is unfortunate, because you could really use a massage with a happy ending (i.e., a nap). Recharge your relationship with a three- or four-hour party for two in the sumptuous 700-square-foot Mandarin Suite, which has its own stone sauna, soaking tub, treatment tables, and daybed. Order from the spa menu for sustenance (you’ll need it) — an exotic fruit plate and some champagne to start. Follow it with a couple’s massage, or just tell the staff to skidaddle and get down to business. In other words, dippity do da. Available at The Spa at Mandarin Oriental, 776 Boylston Street, fourth floor (617-535-8820 or mandarinoriental.com). Photo: Courtesy of Mandarin Oriental Hotel Group READ Boston Book Festival What: Meet the author of The Polar Express, have tea with Catie Copley (the dog that lives at The Fairmont Copley Plaza), and keep an eye out for Madeline and Curious George. Why: Read on. When: Sat., 10 a.m.-6 p.m. Where: Various locations, including the Boston Public Library, Old South Church, and outdoors in Copley Square (617-252-3240). WONDER Harry Potter: the Exhibition What: More than 200 authentic props and costumes from the films, including the Great Hall, Hagrid’s hut, and the Gryffindor common room. Why: You’ll be spellbound. When: Sun.-Feb. 21. Mon.-Thurs., Sat. & Sun., 9 a.m.-5 p.m.; Fri., 9 a.m.-9 p.m. Where: Museum of Science, 1 Science Park (617-723-2500). SAIL Jamaica Pond Celebration Neighborhood Open House What: Enjoy sailing, rowing, kayaking, cider, and hot cocoa in support of the nonprofit Courageous Sailing Center. Why: Anchors away. When: Sun., noon-4 p.m. Where: Jamaica Pond Boathouse, Jamaica Way, at Pond St. (617-268-7243).