The producer/DJ-guitarist/singer combo BoomBox is like an all-out big-room DJ show that's actually fun. The duo's all-encompassing groove is in demand, and live shows sell out all over the country. It's a trance-like experience that's finding a crossover crowd of techo heads and jam-band fans, and for good reason: Zion Rock Godchaux, the live musician half of the group, is the son of the Grateful Dead's Keith Godchaux — but don't hold that against him.