As hip-hop began its ascent in pop culture, many jazz musicians embraced it, trying to infuse its infectious rhythms with an improvisational and harmonic sophistication. While such experiments have mixed results, we’ve seen several groups who continue to try to bridge the chasm between the two genres. One such band is Blackout, an impressive ensemble that will perform tomorrow night at the Kennedy Center’s KC Jazz Club. The talented quintet is steeped in jazz…