Local 61 (located at 61 Bergen Street, just east of Smith Street) is a solid beer bar in the heart of Cobble Hill.  As its name suggests, the place focuses on local offerings.  Much of the beer menu features a selection from Brooklyn and nearby NY State, with a few from Eastern PA.  There are also some Long Island wines available.  The chalkboard menu is unique.  Shaped like a geographical cut-out of Brooklyn, it lists all of the drink offerings.  The food menu focuses on small plates.  The beer offerings rotate frequently and this spot is one of the few places I know of that serves beer from Barrier Brewing Co., a small brewery on Long Island.  Local 61 is spacious with communal and high-top tables to accommodate medium-sized groups.  Definitely worth a visit, Local 61 needs to be part of any beer-focused Cobble Hill NYC bar crawl.