How is it that more rock fans aren't talking about Dr. Dog? The Philadelphia group possesses an encyclopedia's worth of knowledge of '60s and '70s pop and rock. Its expert "Shame, Shame" was an underrated gem from 2010, and its follow-up, "Be the Void," scuffs up the edges of the group's well-crated sound for jangly instrumentation and a raucous, feel-good core that's awfully tough to resist. Orpheum Theatre, 842 S. Broadway, L.A. 8 p.m. Fri. $22.50. http://www.ticketmaster.com.