The East River bar is directly underneath the Williamsburg Bridge - easily accessed by car or from the L or the J trains.

For the L train, get off at the Bedford Ave stop, the 1st stop in Brooklyn on the L line. Walk down Bedford Avenue (south) towards the Williamsburg Bridge, take a right as soon as you pass underneath the bridge (on S 6th Street), half way down the block you will see the East River Bar on the right hand side.

For The J train, get off at Marcy avenue stop, walk west on Broadway until you hit Bedford Ave.  Veer right on S 6th Street and half way down the block you will see the East River Bar on the right hand side.

Driving- go over Williamsburg Bridge, take first right to West Broadway Exit cutting all the way to the right.  Two lights down, when you reach Bedford Ave., follow the right fork onto S 6th Street.  The East River Bar is half way down on the right hand side.