You already know what Harpoon is, because it’s been on tap at every restaurant and bar in the city since the Spice Girls were an unironic thing. With big communal tables and even bigger windows overlooking the Seaport and parts of downtown and harbor, the tap room is a great place to grab a beer, even if it tends to be filled with a lot more tourists than you’ll find at most Boston breweries. The food selection begins and ends with pretzels, but you’re here for the beer, anyway.