Calling commando green thumbs!
The event entails a commando-style reclaiming of street parking spaces* for temporary mini-parks, complete with green grass and various features – benches, trees, bocce ball, you name it! – to encourage random public participation.
*Being ‘not necessarily’ sanctioned by the city (what fun would THAT be?) the interveners are encouraged to abide by the law, and feed the parking meter!