5200 Paint Branch Parkway. Inside the Washington Beltway (I-495), near the University of Maryland's main campus in College Park, MD.

From University of Maryland:
From the main entrance, drive 1/2 mile down Paint Branch Parkway to the Tennis Center on your left. Driving time: 3 minutes

From Downtown DC:
Follow New York Avenue which becomes 295-N/Baltimore-Washington Parkway. Exit at Rte. 410, left at the bottom of ramp, right onto Kenilworth Ave. (201 North), left onto Paint Branch Parkway. Continue 1/4 mile to Tennis Center on your right.
OR
Follow 17th Street south then left around the Tidal Basin. Take the middle lane and merge onto the Southeast Expressway. Turn right onto Pennsylvania Avenue. Turn left at the first light onto the Anacostia Parkway north. Merge onto 295-N/Baltimore-Washington Parkway. Exit at Rte 410, left at bottom of ramp, right onto Kenilworth Ave. (201 North), left onto Paint Branch Parkway. Continue 1/4 mile to the Tennis Center on your right.
Driving time: 25 minutes

From NoVA/Montgomery County/Baltimore:
Follow the Washington Beltway (1-495 East/South) to Exit 23-Kenilworth Avenue (201 South). Head inside the Beltway (south toward Bladensburg) for 2 miles. Turn right on Paint Branch Parkway. Continue 1/4 mile to the Tennis Center on your right.
Driving time: 20-40 minutes

From Ft. Washington and points southeast:
Follow the Washington Beltway (1-495) to Exit 23-Kenilworth Avenue (201 South). Head inside the Beltway (south toward Bladensburg) for 2 miles. Turn right on Paint Branch Parkway. Continue 1/4 mile to the Tennis Center on your right.
Driving time: 20 minutes

METRO:
Green line to College Park-Univ. of Md station. Walk two blocks down Paint Branch Parkway and cross to the Tennis Center (Can see tennis bubbles from the station).