There is nothing about this video that isn’t cute. Apparently, this is a subway station at Williamsburg, and the players are a group called Coyote & Crow:
When I see things like this, I always think of one of my favorite theorists, Patsy Healey, and her concept of the Convivial City. It’s exactly what it sounds like: cities where good spirit and good will come together so that public places are a celebration of the good things in life. It’s such a good-hearted concept.