Parked in front of the Roxie Theater the other night was a big red art bus that said Dracos Rojo across the front. Inside were two young musicians from Belgium and hanging from the roof was a Shure Super 55 that was plugged into a very reverby amp. They were inviting passersby to climb aboard and drink and get high and play music, so I pulled out a harp and jammed with them on "All Of Me," "Blue Monk," and "When The Saints Go Marching In."