• We checked out Chicago house spinners Colette and DJ Heather at Mighty, with an ear on the club's new sound system. With the old speaker towers gone, the place feels roomier. The new EAW system gets just as loud, but distorts much less than the old RLA. Using all that new power, the DJs kept a sizable circle of house dancers going on Saturday.
• Anthrax pummeled the Regency Ballroom along with High on Fire, Exodus, and others on a bill focused on old-school thrash. We were awed by openers Holy Grail and Municipal Waste, but equally impressed by the brutal, somewhat weird sound of NYC godfathers Anthrax.
• Date Palms is an Oakland outfit that specializes in experimental psychedelic world music, and their Easter evening set at Hemlock was a revelation. Recently signed to Thrill Jockey, the quintet's buoyant thrum recalled the droney, psych vistas of longtime Werner Herzog collaborator, Popol Vuh.
• Michelle Shocked's Santa Cruz gig was cancelled after she went on an anti-gay tirade in S.F. But the beleagured alt-folk singer showed up anyway, and played her acoustic guitar alone on the doorstep. She was dressed in a white safety suit and covered in cryptic sayings, such as "Gimme Wet Not Spit." Was it a play for pity or just more craziness?
• Along with his Coachella appearance, Lou Reed canceled his upcoming San Francisco show and all other approaching California shows, "due to unavoidable complications." Who is he, Morrissey?
• R.I.P. Robert "RZ" Zildjian, who founded Sabian cymbals with the alloy developed by his Turkish ancestors in the 17th century. RZ was born in the U.S., and founded Sabian after losing control of Zildjian in the wake of his father's death. On the strength of rock's rise in the '60s and '70s, Sabian became the second-largest cymbal maker in the world.