Where’s the only place in Sonoma County that rolls out the red carpet to the accordion every year? Cotati, of course! The 22nd Annual Accordion Festival makes its appearance this weekend, exciting the hearts of diehard accordion lovers and players. The featured performer is Renzo Ruggieri, Italy’s jazz accordion legend. This sunglass-wearin’ accordionist founded an acclaimed organization of music schools, has collaborated with and arranged music for dozens of artists, and tickles a mean squeezebox. The two-day fest includes many other performers (don’t miss Polkacide), dance parties and a play—along to “Lady of Spain.” Led by honorary director John Volpi, who frequently plays his accordion in the back bar at Volpi’s in Petaluma, the festival fun runs Saturday, Aug. 17, to Sunday, Aug. 18, at La Plaza Park. 60 West Cotati Ave., Cotati. $15—$23. 9:30am. 707.664.0444.