Friday Afternoons: Slack Key Guitar Concerts.  Traditional Hawaiian slack key guitar and `ukulele concerts. August 3 – Legends of Slack Key; August 10 – Your Island of Peace; August 17 – Honoring Raymond Kane; August 24 – Aloha Music of Hawai`i, August 31 – Hawai`i’s Cowboy Music.  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…