t would be easy to call the Vancouver-based band The Pack A.D. a female version of the Black Keys or the White Stripes. After all, they are a duo and they do play the same brand of Junior Kimbrough influenced blues-rock. But that would unjustly undercut the unique and utterly impressive skills of Ms. Becky Black, who can absolutely shred on the guitar and wail on the vocals. If Janis Joplin and Jack White had a baby, she would be it. If there's any justice in the world, it won't be long before The Pack A.D. explodes. But, before that happens, you can see them tonight at L'Escrogriffe. Forget name recognition; if you don't go, you'll regret it. Even if you don't know it.