Halloween’s not just for humans—the Seaport Hotel welcomes four-legged friends to a canine costume party on Saturday, October 29th. Pups can make their way (with owners in tow) to the Hotel’s plaza-level garden for Howl-O-Ween, starting at 11:00am. Bipedal revelers will have the chance to order a la carte drinks and snacks while dogs will be treated to homemade organic treats. Prizes will be given for best dressed dog, best owner costume and best dog-owner ensemble. Howl-O-Ween is free for people and pets to attend, but spaces can be reserved online here (provided the weather isn’t too ruff).