Garaj Mahal (Facebook photo).
Steve Fly, e.g. Steve Pratt, on Twitter: "One my fav. Garaj Mahal tunes, called "Be Dope" here live in San Francisco 2001 at the DNA Lounge. Some memorable heavy funk. Many thanks to Archive for such an expansive GM collection."
I should explain that some bands, not just the Grateful Dead, allow their performances to be recorded live by fans and posted on the internet. The Internet Archive hosts many such recordings. I am a fan of one the bands that allows this, the Gin Blossoms.