Amid the shopping throng of Rua Santa Catarina,  this is a restored early 20th-century three-story townhouse with just six rooms. Its atmosphere is intimate and cozy; its prime perk is the shared kitchen and dining room for guests, plus a lounge with floor-to-ceiling windows opening over the pedestrian street below. Out back, the sunny garden is an urban oasis. Rooms are simply, but comfortably furnished with soft duvets, throws in pale earthy colors, polished hardwood floors, sink-into leather armchairs.