The debut show, “Second Lives: Remixing the Ordinary,” is supposed to be about how artists reuse humble or unusual materials. There’s good work here, but much of what’s on view is actually more about obsession and repetition: a couch made out of 3,500 quarters, a necklace composed of 100 handgun triggers. The building, too, seems caught between wanting to be an object of decorative delectation and making an architectural statement.