A pewter plaque outside the back door of Shins keyboardist Marty Crandall's Portland, Oregon, home explains that the two-story residence, known as the Alfred J. Armstrong House, was built in 1894 and is listed in the National Register of Historic Places. Inside, the living room appears immaculately preserved -- gilded molding, an ornate mahogany fireplace, gold orchids stenciled onto muted green walls. It could double as a museum exhibit on Queen...