Yes John, I think that's how to start a new revival, take the music back to the people don't for them to come to us.
These street performances encourage people to participate even if its just dancing or clapping in time.....I remember that excitement from the folk music of the early sixties when the hard travellin' men only cared about getting a bed a drink and spreading the word.
That jazz group get a big kick when the "audience" show their appreciation of their performance......I love it!!