The annual Strauss Ball, a fundraiser for Glen Echo Park programs, happens this Saturday, May 4. Music by Olde Vienna: Elke Baker (violin, viola), Andrea Vercoe (violin), David Wiesler (piano), Barbara Heitz (flute, piccolo) and Ralph Gordon (bass). Admission of $30 per person includes Viennese waltz lesson with Mike Marcotte from 8-9, dancing from 9-midnight, refreshments, dance cards and, of course, the Grand March, led by the incomparable Stan Fowler. Dressy attire suggested, but not mandatory. All ages welcome!