With an army of horns, a restless rhythm section and a vocalist that sometimes treats his position in this brass band as though he were leading a pack of hardcore insurgents, No BS! is all party. In fact, in 2010 at Richmond's increasingly legendary Best Friends Day, the troupe attempted to lead the world's largest conga line through a water park, with kids in swim suits falling in place to dance, drink and, well, form an enormous conga line. But don't take the zaniness as a permission slip for sloppiness: These are conservatory-trained players and members of Bon Iver, Matthew E. White's band and Fight the Big Bull who have chosen to supplement their more serious endeavors with seriously sweaty and exuberant nights of covers, anthems and blasts. Elikeh opens. —Grayson Currin