Cisco Brewers’ Seaport outpost brings a slice of Nantucket to the waterfront on Northern Avenue, and it’s about as unbuttoned as Seaport nightlife gets. The sprawling open-air beer garden pours Cisco standbys like Grey Lady and Whale’s Tale alongside Triple Eight cocktails and Nantucket Vineyards wines, with wood-fired pizza, tacos, and clam-shack classics like lobster rolls to soak it up. Local bands and DJs take the stage nearly every day of its season, which runs from spring into mid-fall.

Entry is free and first-come, so the picnic tables fill fast on sunny weekends. Expect flip-flop energy rather than bottle service: groups of coworkers, boaters wandering up from the harbor, and beach-band singalongs as the sun drops. Reservable beach shacks handle bigger crews, and a covered tent keeps the party going when New England weather does its thing.