This weekend in my town, 6 bands will be getting together for a 2 night holiday extravanganza. It is being held at the biggest club in town and is going to be the place to be this weekend. All money goes to The Empty Stocking Fund to help needy children. Anyway, at one point in the show, 2 members from the host band are getting together with one another band's guitarist and another band's drummer, and me, the bass player. We are going to record a live song for the benefit to sell. Its a Christmas song, but its a blues number one of the guys wrote. I have no idea how to play blues. What are some good blues riffs and interval patterns?????????