Last night I had a most enjoyable experience listening to the Cause, a Greatful Dead, Beatles, Dylan etc. cover band that also tossed in a few of their own (notably "Never Alone" written by Pappy, the lead guitarist). During my 25 years in Santa Cruz and San Francisco I was fortunate to see the Grateful Dead several hundred times and was (nearly) always pleased by how "live" the band was in a very improvisational jazz kind of way.