Sag Harbor’s Main Street and adjacent alleys are made for shopping. There’s stylish décor with a beach-house vibe at Beach Bungalow (left). Sage Street Antiques, in a white-painted mansion, is a must for collectors. Fashion hounds head for Donna Karan’s Urban Zen or rifle through pristine high-end apparel at Collette Designer Consignment. The Sag Harbor Cinema, an Art Deco structure with iconic neon signage, shows two or three art films and foreign films a day. Sag Harbor Variety is a rare surviving example of an old-fashioned five-and-dime.