Reunion shows are generally intended as a celebration of days gone by for those who were there the first time around, a moment for grizzled old-timers to reflect on how good it was back in the day. But in some rare instances, these shows also serve as a primer for the new breed, showing them just how it's done. Such was the case this past September when three of Denver's fabled bands from the '90s — the Volts, Crestfallen and Christie Front Drive — got back together at the Marquis for Denverfest 3. Longtime fans were relieved to hear that their heroes hadn't lost a step, while others discovered these venerable acts for the very first time.