The World Bank's Black Auditorium is located at H Building (600 19th Street, NW), across the street from the main World Bank building. Use the G Street entrance to the auditorium.
Metro Directions:
The nearest station on the Orange Line is Farragut West (about 2 blocks from the main World Bank building). The nearest station on the Red Line is Farragut North (about 3 - 4 blocks from the main building).
Bus Directions:
Use the Metro Trip Planner. One can type in the hotel or other address you will be coming from - and then the Black Auditorium's address of 600 19th Street, NW as your destination, and receive detailed public transportation directions.