By Don Heckman Los Angeles – Mar. 9. (Tues.) John Pisano’s Guitar Night.   John Pisano trades riffs with Pat Kelley, who has transformed his Oklahoma roots into an amiable, highly personal guitar style. Ralph Humphrey, drums and John Belzaguy, bass, provide sturdy back-up.  Vitello’s.   (818) 769-0905. – Mar. 9. (Tues.) Bill Watrous and the San… Read More Picks of the Week: Mar. 8 – 14