“Evenings at Salt Pond” continue with Crabgrass performing in the Salt Pond Visitor Center auditorium, 50 Nauset Road in Eastham, on Tuesday, Aug. 24, 7 p.m. Considered Cape Cod’s premier band for “foot-stomping bluegrass,” Crabgrass consists of Chris Miner on mandolin, Les Beavan on banjo, Dan Fortier on guitar, Katy Boc on fiddle, and Ted Mello on bass.