Has any one have any advice on how to learn how to Jam? I Joined a group of guys the other night for a jam session on some Dead and I did not know what to do. I know how to play simple blues progressions and that is what I've been focusing on the last couple of years. I know scales and chords but I cant understand what to use when. One of the guys told me that a 7th over a major scale is no good. I used a Major 7th. With Gov't Mule, Allen Woody seems to use a lot of 6th's on "30 days in the hole." I can't even imagine what Phil Lesh is playing. What are some good songs to listen to?