Just like park(ing)day, but with musicians and bands! We create the stage and set-up and get the permits, and we do outreach to musicians, bands, poets, to do open-mic style entertainment. Donations could provide stipends for entertainers. This could tie into a Park(ing) Day 2.0–since they figured out logistics and materials last year, there’s more time for design, outreach to businesses, and maybe multiple mini-parks.
Free music, happiness spreading! :)