There is one at Hains Point.
From
http://www.dcchamber.org/page.jsp?page=Golf
East Potomac Park Golf Course
970 Ohio Drive, SW at Hains Point
Washington, DC 20024
Phone: 202-554-7660
East Potomac Park Golf Course and Driving Range won "Best Golf Course" in washingtonpost.com's Best Bets 2002 Readers' Choice contest.