The perennially cool Table of the Elements label, which unites avant-rock, minimalism, psychedelia and much more under its roomy umbrella, stages a three-night fest at Issue. Tonight's bill includes six-string visionary Rhys Chatham, the multimedia improv trio Text of Light (which includes drummer William Hooker with guitarists Alan Licht and Nels Cline), experimental percussionist Jon Mueller and husky songsmith Peg Simone.