Most bands pillaging the coffers of '70s rock pull from the rich if over-tapped urns of Led Zeppelin, Black Sabbath and AC/DC on the hard-rock side, and ELO, the Eagles or Fleetwood Mac on the softer end of the spectrum. Twin Peaks (due this Friday, January 4, at the Larimer Lounge) takes cues from both, but the overall effect is more like Steely Dan, if that band had aimed more for hard rock than lounge jazz. There's something loose and mellow about the music of Twin Peaks, but there's also a groovy edge to it. The group's image and presentation skew toward blue-collar metal, but the vibe has a certain Laurel Canyon cool going on, too. In 2011, the band released the excellent Oolaroo; this year's Lifetaking seems thematically darker but no less appealing or sonically colorful.