From 23rd and Constitution Ave, take 23rd towards the Lincoln Memorial. Bear right on axis road prior to crossing Memorial Bridge and you will
see the courts on the right. Ample parking is available.
Click here for an amazing tool, not just for DC Doubles.
The Park is between the Lincoln
Memorial and Kennedy Center. In google-earth (http://maps.google.com/maps),
you can see the 11 courts from a Satellite-view using these coordinates: