After just a little shopping in the Back Bay, you'll appreciate what a find this cozy place is: a bargain on Newbury Street. A pair of brick town houses built in the 1880s and combined into a refined inn, it offers comfortable furnishings, nifty architectural details, and a buffet breakfast served in the ground-level dining room, which adjoins a brick patio. Rooms are modest in size but nicely appointed and well maintained. The largest and most expensive are the bay-window units, which overlook the lively street. The B&B opened in 1991 and operates near capacity year-round, drawing business travelers during the week and sightseers on weekends. At these prices in this location, there's only one caveat: Reserve early.