Eight ukulele ensembles(!) — including Newton’s own City Hall Strummers — will gather on June 9, 11AM-4PM indoors at Newton City Hall for Strummin’ Up to Boston, a free music festival celebrating all things ukulele. Food trucks, vendor booths, and a group musical strum-along led by local ukulele personality Danno Sullivan. The event is free, and all ages and strumming levels are welcome!