Friday Evenings: Slack Key Guitar Concerts.  Traditional Hawaiian slack key guitar and `ukulele concerts. October 2 – Hanalei Slack Key; October 9 – Legends of Slack Key; October 16 – Honoring Raymond Kane; October 23 – Honoring Keli`i Mawae of Molokai; October 30 – Hawai`i’s Sunset Music.  Free gift drawing.  Tickets: $20 ($15 keiki/seniors).  Slack key guitar and `ukulele in the real old style.  All traditional music with songs and stories of the islands, telling the history of this Hawaiian musical…