Keep the fun going in Grass Valley at a local favorite, Grass Valley Brewing Company. Party starts at 8pm. Live music from UnderCover starts at 9pm. 141 E Main Street, Grass Valley UnderCover plays a mix of favorites from the genres of rock, southern rock, and country music. The band has strong vocals with excellent harmonies. Band members are all longtime Nevada Countyians. UnderCover has been part of the local music scene for decades.