By Don Heckman Los Angeles – Feb. 14. (Tues.)  Nedra Wheeler.  Bassist/vocalist Wheeler is a convincing performer as an instrumentalist and a singer. and she’ll no doubt be in rare form with the backing of  Lanny Hartley, piano, Clarence Webb, saxophone and Munyungo Jackson, drums.  Vibrato Grill Jazz…etc.   (310) 474-9400. – Feb. 15. (Wed.)  Spanky… Read More Picks of the Week: Feb. 14 – 19