Sunday Afternoons: Slack Key Guitar Concerts.  Traditional Hawaiian slack key guitar and `ukulele concerts.  May 6 – Sweet Hawai`i Dreams; May 13 – For the Birds; May 20 – Aloha Music of Hawai`i; May 27 – Kaua`i Slack Key.  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. Free gift drawing.  A portion of the proceeds supports the…