Electric-guitar quartet Dither's yearly bash has a lot going for it this time around: sets by Jace Clayton (a.k.a. DJ Rupture); James Ilgenfritz, a bassist as adept at playing Anthony Braxton pieces as he is at performing Annie Gosfield's music; plus a guitarist named Lee Ranaldo (who used to be in a local rock band of note). Singer Mellissa Hughes, banjoist Brandon Seabrook and avant-metallers Cleric are also on the six-hour bill. Plus, there's free beer courtesy of Brooklyn Brewery. What's not to love?