You only have to look at the Billboard charts to notice that Americans as a whole have taken to club sounds lately. As I type this, our number-two song, “We Found Love,” has Rihanna singing over a straight-up ecstatic house production by Calvin Harris. But there’s also a deeper boom going on, one you can trace down from hit producers like David Guetta and Swedish House Mafia to the huge rave-style events they play in this country; and from there to big-tent, pop-minded acts like Deadmau5, Aviici, and Kaskade; and from there to the way Skrillex can pack tour dates in places like Montana; and from there to peers like Bassnectar and 12th Planet.