Are the Bad Plus a pop and rock-influenced jazz trio? Or are they a power trio who like to play jazz? It’s really a bit of both. But in the brave new world of postmodern jazz, identity crises are encouraged. They are a group unafraid to stray from the confines of jazz, but confident enough in their forays to make them stimulating, and not simply novelties. Their releases have been critical success, garnering best-of honors from the New York Times and Chicago Reader, among others. In addition to original compositions, their re-imaginations of non-jazz tunes like “Smells Like Teen Spirit” , Blondie’s “Heart of Glass,” and Aphex Twin’s “Flim” show the trio’s powerful mixture of personality and performance that really defines them.