Park Slope and Gowanus abound with great bars, from neighborhood gay and lesbian bars to upmarket cocktail dens. Excellent options range along Fifth Ave, including the popular Union Hall; Gowanus has some singular places on Third and Fourth Aves on and around Union St. Greenwood Heights has a few places with great outdoor space, and for a classic Brooklyn dive bar with a storied history, try the inimitable Freddy's on Fifth.