Friday Afternoons: Slack Key Guitar Concerts.  Traditional Hawaiian slack key guitar and `ukulele concerts. May 5 – Honoring Keli`i Mawae of Molokai; May 12 – Heart of Slack Key; May 19 – Mountain to Sea; May 26 – Tour of the Islands.  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 of the…