This Friday, July 6th, The Tatami Mats will perform "Dark Side of the Uke"--a ukulele-only version of Pink Floyd's "Dark Side of the Moon." Why is this happening? It's the second anniversary of The Knockout at Mission and Valencia in San Fran., 10 p.m. start time. Too rich for my blood, but I'm always up for some ukulele orchestrations. May the spirit of Don Ho be with them.