Truth is, only a minuscule percentage of those passerby's would be likely to be among the few hundred or so (out of a city of millions) that would have gone to a concert of his in the first place.

Compare this to the way that you can bring traffic to a grinding halt in Times Square, or in London, by having the Beatles, or U2, or Madonna perform on a rooftop or behind a glass wall for MTV....

People will stop and listen to it, if it is the kind of music they WANT to listen to. A lesson for us all.