The Grateful Dead is so old! They started in 1965 in California.
I didn't realize that started that long ago. I've never been a big fan of their music, to be honest. 
Lenny Kaye said that their music touches ground that most other bands don't even know exists.
Well, that is quite an endorsement. Jerry Garcia was one of the original members, right? I remember when he died. 
Yes, and they were the pioneers of the jam band world thanks to their diverse sound.
Oh, what's the jam band world?
Jam band just refers to groups who record live albums that are catered to a particular fan culture, and it started with the Grateful Dead in the 1960's.
Oh, I didn't know that term. Well, I know the Deadheads are very loyal to their band!