Jake Shimabukuro will be performing in Washington, D.C., at the Kennedy Center's 24th Annual Open House Arts Festival on Saturday, 13 Sept, and it's free.
http://www.kennedy-center.org/calendar/index.cfm?fuseaction=showEvent&event=XIOPN
http://www.kennedy-center.org/calendar/index.cfm?fuseaction=showEvent&event=XIOPN