Vinegrass, a nonprofit championing American Roots music, will hold a fundraiser with bluegrass aficionados AJ Lee & Blue Summit at Truro Vineyards, 11 Shore Road, on Monday, Aug. 16, 6:30 p.m. There will also be a silent auction, cash bar, and provisions from the Crush Pad food truck. Tickets are $30 at vinegrass.org.