I didn't find many photos for this in Austin on Flickr. I know it was observed, though, because I did see some photos posted on Facebook from a friend. Anyway, Austin has a ton of parks around downtown anyway so it's not surprising that this hasn't caught on here. Sitting on asphalt next to the street isn't exactly what I'd call a "park".
This is Congress Avenue. You can see the Texas Capitol at the end of the street.
http://www.flickr.com/photos/pfrench...31949/sizes/l/