Sunday Afternoons:  Slack Key Guitar Concerts.  Traditional Hawaiian slack key guitar and `ukulele concerts.  December 2 – Hanalei Slack Key; December 9 – Hawaiian Slack Key Guitar & Ukulele; December 16 – Honoring Raymond Kane; December 23 – Hawaii’s Cowboy Music; December 30 – Hawaii’s Sunset Music.  Tickets: $20 ($15 keiki/seniors).  The concerts are nahenahe - soft and sweet.  Slack key guitar and ukulele in the real old style.  All traditional music with songs and stories of the islands, telling…