Thanks to an $18-million renovation, the Copley Square Hotel has hurtled into the present with high-tech registration pods, cushy mattresses, and in-room iPod docks—not too shabby for a place that opened in 1891 and has provided respite to a century of celebrities like Babe Ruth, Ella Fitzgerald, and Billie Holiday. The mod rooms are so clean and streamlined that you just might overlook the fact that many are teeny. Nevertheless, the old-meets-new vibe is fun, and the neighborhood couldn't be livelier; the hotel itself is home to Storyville, a revamp of its previous bar. If its all-white banquette seating is full, order some Kobe sliders and hang at the bar. Their other casual restaurant Xhale serves up comfort dishes such as mac and cheese and garlic-rosemary fries. To maximize your Zs, get a room in the back of the hotel, preferably high up, where traffic noise—and the rowdy partying—isn't so audible.