On a primal level, we react to music through movement. A head-nod, a foot-tap, or a handclap certainly shows appreciation, but dancing seals the eternal bond between audience and musician. Siphoning the spirits of rock, funk, R&B, jazz, and pop through a kaleidoscope of unpredictable and virtuosic improvisation, Boston-based seven-piece Ripe consistently bring people to their feet. Most importantly, they prove that “dance music” in its purest form doesn’t have to come from computers and synthesizers. It can be an unstoppable groove or an extended moment of ecstatic release.