On a nondescript street near North Station, the 1904 flatiron-shape building stands out; the odd exterior means that every guest room has a unique layout, including triangular units in the pointy end (and a handful of rooms with twin-and-full-size bunk beds). All have blue-gray walls and custom furnishings that make the small rooms feel more spacious than they are, as well as marble-clad bathrooms. Rooms on higher floors of the nine-story building (there’s just one elevator) are farther from street noise, but the views are uninspiring no matter how high you go.