Friday Afternoons: Slack Key Guitar Concerts.  Traditional Hawaiian slack key guitar and `ukulele concerts. August 4 – Slack Key Tour of the Islands; August 11– Legends of Slack Key; August 18 – Honoring Keli`i Mawae of Moloka`i; August 25 – Heart of Slack Key.  Free gift drawing.  Award winning traditional Hawaiian slack key guitar ad 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…