CANCELED Bob Weir & Ratdog + The Chris Robinson Brotherhood

Rhythm guitarist Bob Weir has gone through many a transformation since his days as one of the Grateful Dead's founding members (we can thank him for staples like "Truckin'," "Sugar Magnolia" and "Cassidy," among others). Ratdog became Weir's main gig in the mid-'90s, and for 15 years, the rock outfit switched out dozens of notable band members, released two full-length albums and performed live shows the world over. These days the troupe rolls with an unusual two-bass-guitar lineup and jam-band ringer Steve Kimock on guitar. Black Crowes singer Chris Robinson opens with his easygoing yet poignant soul-rock group.