Grab a spot on River House’s outdoor patio along the waterfront for some prime views of the harbor and its tugboats tugging along. The seafood-heavy menu includes all the oceanic hits: lobster rolls, chowders, and a raw bar with oysters, shrimp cocktail, and crudo. If you made the mistake of trying to snag a table during peak sunset hours, opt for plan B, which is squeezing onto the cocktail deck with a round of blood orange gin spritzes until something opens up.