With the ensemble's ranks presently including a retired University of Iowa jazz professor, a former Augustana College guitar instructor, and a current Augustana professor of astronomy, Iowa City's popular rock and blues tribute musicians The Beaker Brothers Band play a rare Quad Cities concert on November 13, the group's Sunday Funday concert at Moline's Viking Club a joint effort between the venue, the Mississippi Valley Blues Society's entertainment committee, and Rudy Hernandez.