Los Angeles is a city best experienced at night and in motion, and the best soundtrack for your after-dark walk, drive or bus ride is house music. In a club setting, a good house DJ can read the crowd and give them what they didn't even know they wanted. DJ Kristi Lomax is somehow able to do the same thing on the radio, reading the collective mind of Los Angeles every week on her KPFK show, One Track Mind. Starting at 10 p.m. on Friday nights, Lomax takes her listeners through the soul-imbued deep house of people such as Moodymann, the tech-house of artists like K-Hand and the footwork-inspired glitches of Machinedrum, along the way offering interesting reflections on the music and the artists behind it. It's a much-needed service to a genre with a progressive, revolutionary history that newer fans might otherwise never discover.