Chris Amberger and the Hot Dogs featuring the Gabe Gladstein Trio When: Saturday, Aug. 16 Where: Seasons of the Vineyard, 115 Plaza St., Healdsburg Time: 4 – 6 pm; no cover. Chris Amberger, the Bay Area’s preeminent upright bassist and a Berklee College of Music graduate, has been performing and recording with a long list of jazz greats since the late sixties, among them Sammy Davis Jr., Bobby McFerrin, Cal