Friday Afternoons: Slack Key Guitar Concerts.  Traditional Hawaiian slack key guitar and `ukulele concerts. July 6 – Gift of the Ancestors; July 13 – For the Birds; July 20 – `Ohana Slack Key; July 27 – Spirit of Slack Key.  Free gift drawing.  Award winning traditional Hawaiian slack key guitar and ukulele concerts featuring songs and stories telling its history.  Tickets $25 general admission, $20 Ages 13-19 & over 50, keiki under 5 free.  A portion of the proceeds support…