I wish there were a zero transaction cost way to pay all the random street performers when I pass them in the metro stations. Too often I'm late to get somewhere or I just don't have any spare change on me. And so over the years I have derived a nearly incalculable amount of joy from hurried snatches of jazz or funk, from the aching melodies of ragged violinists, the irrepressible energy of homeless saxophonists, the foot stamping rhythms of bucket drummers, the easy charm of old accordion players, the anguished beauty of long drawn out notes from street side opera singers...

and I never even stopped to tell them thanks.