National Gallery of Art Sculpture Garden - The National Gallery of Art offers free jazz performances at Jazz in the Garden at its outdoor café every Friday evening throughout the summer. 5-8:30 p.m.

Herndon Rocks - Free outdoor concerts every Friday through August 28. 6:30 - 10:30 p.m. on the town green in Herndon.

Strathmore Hall Free Summer Outdoor Concerts are held Wednesday nights from June 24 - August 5 at the Gazebo. This series features a collaboration with the Smithsonian Folklife Festiva. Rockville, Maryland.

Military Bands, various locations Navy Band at the Navy Memorial on Tuesdays (8 pm); US Air Force Band on Wednesdays & Fridays (8 pm); or the US Marine Corps Band on Wednesdays (8 pm)

Pentagon City Summer Concert Series - Live music, free prizes, merchant specials and more. Thursday nights, through August 20. 7-9 p.m.

Old Town Alexandria Market Square, 301 King St. at 7:30 p.m. June 5 & 19; July 17 & 31; & August 7 - Alexandria Citizens Band Concerts - the City's Oldest Performing Arts Group. August 14 - Alexandria Harmonizers.

Vienna Town Green - Concerts On The Green is a free performance series presented by the Town of Vienna and the Friends of the Vienna Town Green. Various dates.