Sunday Afternoons: Slack Key Guitar Concerts. Traditional Hawaiian slack key guitar and `ukulele concerts. August 3 – Kaua`i Slack Key Guitar & Ukulele Concert; August 10 – Hawai`i’s Cowboy Music; August 17 – Circle of Life; August 24 – Gifts of the Ancestors; August 31 – Poina `ole – Never to be forgotten. 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…