Handwritten Notes: "Gretchen on her 6 ft. unicycle / 1979"

Can you identify any people, things, places, or events in this photograph? How about the time period? Or do you know where this photo came from? Email me at cbaer@vineyard.net.

Date: 1979
Location: Vineyard Haven - neck - Tashmoo Ave. + Franklin St.
People: Baer, Gretchen
Keywords: bicycles; bikes;