Directions: Union Hall is located in Park Slope, Brooklyn, right off the corner of 5th Avenue on Union Street. R train to Union Street. Walk 1 block east. F train to 4th Avenue. Walk north on 4th Ave and turn right on Union Street. 1 block up. Q, 2, 3, 4, 5 trains to Atlantic Avenue. Walk south on 5th Ave. Make a left on Union Street.