Portland-based dance musicians George Penk (fiddle), Jesse Schafer (cello, guitar, mandolin, tenor banjo, ukuleles), and Jeff Kerssen-Griep (guitar, bass, percussion), the “Flywheel Trio,” help others play tunes by ear and build happy connections via lively, mighty fiddle music aimed at the feet from Ireland, Quebec, Appalachia and beyond. Five-string cellist Jesse S. teaches melody, harmony, and rhythmic backup play on several instruments, and you’ve maybe heard George fiddling on NPR’s “All Songs Considered” or contra danced to George and Jeff’s band “Joyride” somewhere in the US (Jeff’s also taught communication courses at Holden over the years). All are accomplished players and expert, welcoming teachers seasoned in stirring groups’ skills and fun.