In an Oakland basement adorned with Christmas lights, a two-person “mosh-pop” outfit jams in front of a sweaty crowd of college students. The crowd moshes to the fast-paced, resounding tunes as...

Forty kids, bobbing their heads together in a narrow North Oakland basement — it might sound like the awkward early hours of a college house party, but there isn’t any Avicii or “Turn Down For What”...