Winter is made for weekend jaunts to the city. Stay at the new Fifth Avenue Hotel, where the Gilded Age meets modern glamour. Eat at the hotel’s Café Carmellini as well as the newly relaunched Café Boulud, Roman import Roscioli, and Italian steakhouse Lupetto. See Broadway legends Kelli O’Hara and Brian d’Arcy James star in the revival of “Days of Wine and Roses.” 1 West 28th Street, New York, N.Y., 10001. 100 East 63rd Street, New York, N.Y., 10065. 43 MacDougal Street, New York, N.Y., 10012. 1123 Broadway, New York, N.Y., 10010. 254 West 54th Street, New York, N.Y., 10019.