Saturday Evenings:  Kapa`a Slack Key Saturdays.  Traditional Hawaiian slack key guitar and `ukulele concerts.  April 6 – Legends of Slack Key; April 13 – From Mountain to Sea; April 20 – Great Circle of Life; April 27 – Hanalei Slack Key.  Tickets: $20 ($15 keiki/seniors).  A portion of the proceeds supports Na Keiki `O ka `Aina. Located in the Children of the Land Cultural Center, Kaua`i Village (Safeway/Longs) Center, Kapa`a.  5 to 7 p.m.  For information and reservations call (808)…