By Don Heckman Los Angeles – April 17. (Wed.)  Corky Hale and special guest Kathy Sledge of Sister Sledge perform selections from the Billie Holiday songbook. Pianist/harpist Hale, who accompanied Holiday in the ‘50s, is well qualified for the job.  Catalina Bar & Grill.   (323) 466-2210. April 17. (Wed.)  Julian Coryell.  The son of fine… Read More Picks of the Week: April 17 – 21