Jam Cellars’ Butter Chardonnay NAPA — On this week’s episode of Rock’N Vino, Coco Sterzenbach and Mike DeWald take you behind the scenes of Napa’s JaM Cellars winery. Founded by John and Michele Truchard, JaM provides the perfect fusion of wine lifestyle with music culture. Geoff Whitman, the winery’s executive vice president…