Sunday Afternoons: Slack Key Guitar Concerts. Traditional Hawaiian slack key guitar and `ukulele concerts. January 4 – Gifts of the Ancestors; January 11 – Poina `Ole – Never to be Forgotten; January 18 – For the Birds; January 25 – Whales Homecoming. 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 the history of this Hawaiian musical…