Danna Gurari (L) and Joe Medeiros dance during one of the Tango Society of Boston's Tango by Moonlight evenings on the Weeks Footbridge over the Charles River in Cambridge, Massachusetts July 6, 2013.

Danna Gurari (L) and Joe Medeiros dance during one of the Tango Society of Boston’s Tango by Moonlight evenings on the Weeks Footbridge over the Charles River in Cambridge, Massachusetts July 6, 2013.