This past Friday was the 4th annual international Park(ing) Day. Park(ing) Day was started in 2005 by San Francisco art collective Rebar, and has become increasingly popular ever since. Ten merchants in Hayes Valley signed up to do it but I only saw five parks (and one neighborhood-wide installation). The parks were heavily used during the lunchtime hours, and I think if more merchants participated, the neighborhood could become a real destination for this event (though people would have to take the bus!).