CHESS ON CROSSCURRENTS, 3/12:  A extroverted producer who, along with his brother, founded Chess Records, exemplified the independent record business establishing Chicago as the hub of blues music, Leonard Chess was born on this date in 1917.  You will not need to audition to join the Leonard Chess birthday blues bash on Crosscurrents, 3/12 at 8 am.  ( radio link:  http://www.krnn.org )