Just one stop from Manhattan on the L to Bedford Avenue. Nitehawk is a short walk from the J,M,Z (Marcy Avenue) and G (Metropolitan/Lorimer).
Please be aware that there is limited L train service on the weekends until mid May. The L does not stop at Bedford Avenue during this time. Please check mta.info for alternate routes.
From the Brooklyn-Queens Expressway exit Metropolitan Avenue (32B). Any other places, go near the Williamsburg bridge and Google it! There is ample street parking nearby.