Then on K St., there was another sign, and some chairs and a table set up in a parking space. And a bit further east on K was "Perspective Park". This had a structure of tubes about three feet high, three feet wide, and four inches through the tubes, which looked had about the circumference of mailing tubes. Some were stopped or partially stopped with small objects. The passers by were invited to peer through it. I did not.
Back at the office, Google promptly located the web site. Park(ing) Day falls on the third Friday of September, a day on which
PARK(ing) Day is an annual worldwide event where artists, designers and citizens transform metered parking spots into temporary public parks.