Thoughts of 1960s hippie counterculture and psychedelic rock and roll immediately bring to mind San Francisco’s famous Haight Ashbury district. Yet the entire Bay Area, and especially the North Bay, was a hotbed of free love and loud music back then. This week, a new exhibit retraces the steps of the North Bay’s 1960s experience through artifacts, photographs and artwork from the era. ‘The Beat Goes On’ opens with a reception featuring live music by Sonoma County guitarist Matthew Mendosa on Saturday, Dec. 10, at the History Museum of Sonoma County, 425 Seventh St., Santa Rosa. 5pm. $15; free for museum members. 707.579.1500.