If the Coen Brothers were scouting for a Prohibition-era bar in Greenpoint, they’d stop looking once they chanced upon Black Rabbit with its prewar light fixtures, nineteenth-century floorboards, and flower boxes in the windows. Booths outfitted with saloon-style swinging doors are so private that you’ll need to button-activate a lightbulb to get your waiter’s attention. But that’s just the sort of detail that Ethan and Joel get off on. Sure, house concoctions like the Black List (rye whiskey, liquid ginger and lemon juice) and menu items like tangy Welsh rarebit read a little too British pub, but there are plot points to be found in such digressions. A garden with picnic tables is open until 10 p.m.; the sumptuous interior, complete with working fireplace, suggests cinematical possibilities on a snowy evening.