Sunday Afternoons: Slack Key Guitar Concerts. Traditional Hawaiian slack key guitar and `ukulele concerts. July 5 – Ahupua`a – Mountain to Sea; July 12 – Dreams Come True; July 19 – Slack Key Tour of the Islands; July 26 – Hanalei Slack Key. 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…