How's this for a fun way to spend a Friday night: spend $6 for a marathon featuring Marc Ribot, So Percussion, Ches Smith and These Arches, Ted Hearne and Philip White’s R We Who R We, Lesley Flanigan, Nathan Koci, and a multimedia work by composer Paula Matthusen. No, it's not Bang on a Can: it's the 2nd annual Dither Extravaganza at the Invisible Dog Gallery on Bergen St. in Brooklyn. The festivities begin at 7p and will probably roll right into Saturday. I'll be there later on in the evening – hopefully, they won't have polished all the Brooklyn Beer by then.