Trick-or-treating ain’t just for kids anymore. Head to the Seaport on Friday, October 30th for the sixth annual Halloween on the Harbor. Boston duck boats will ferry guests between seven bars and restaurants taking part in the festivities. Stop off at each place to collect tasty treats, cocktails and passport stamps—some places offer prizes for best costumes, too! Participating restaurants include Blue Dragon, Tamo, Whiskey Priest and Temazcal Tequila Cantina, among others. Tickets are just $5 here and will benefit Friends of the Fort Point Channel, a group which offers free community programming for kids and adults in the area.