By Don Heckman Los Angeles – April 19. (Mon.)  Pat Metheny.  The ever-adventurous, all-star guitarist has put together a computerized, remote control ensemble that allows him to play all the instruments in his band. The Orchestrion Tour.  Disney Hall.   (323) 850-2000. – April 19. (Mon.) Larry Goldings.  Organ Night.  The B-3 rules on Monday nights… Read More Picks of the Week: April 19 – 25