rock and jam banRAB... hmmm
first thing that came to mind was String Cheese Incident
also, Keller Williams, Umphrey's Mcgee, Yonder Mountain String Band, Garaj Mahal, New Monsoon, Greyboy Allstars (Karl Denson? Hell ya), Fareed Haque Group, Sound Tribe Sector 9, The Detroit Experiment, Creedence Clearwater Revival, The Band, and Tea Leaf Green.
For live, FREE, recordings of most if not all of these banRAB, go to
archive.org
then click on live music section and search away. A great filter is using the popularity filter to your advantage, it sorts out all of the bad recordings.