Audiences from the classical era didn't shell out massive quantities of cash to pack auditoriums and hold polite applause for the end. They hooted their appreciation at virtuoso playing as it was happening, and shouted suggestions for what to play next between numbers — the primordial equivalent of "play some Skynard." Classical Revolution won't play "Free Bird" for you, but the musicians will play damn near anything else for damn near free. Founded in 2006 when viola player Charith Premawardhana decided to make "chamber music for the people," the organization has since played more than 700 events in 90 Bay Area venues, and spawned over 30 chapters through North America and Europe. And they still have a standing gig every Monday at 8:30 p.m. where it all started, the Revolution Cafe in the Mission.