Formerly a YWCA hotel, the Sheehan is dirt cheap, considering its location 2 blocks from Union Square. Of course, this isn't the Ritz -- but the basic rooms (think a step up from a generic motel) have large, springy beds, and nice touches like gilded mirrors, newish textiles in purples and plums, and original art along with the simple furnishings and clean but plain bathrooms. Ask for one of...