Join ALT 106.7 at Motor City Muscle in Detroit on Sunday August 19th from 4pm until 10pm. Casey will be making a special guest appearance at the ALT 106.7 booth from 8pm until 10pm before he hits the stage to welcome Sponge. Motor City Muscle is free of charge so come out to Campus Marius and Hart Plaza to enjoy live music from over 120 bands on 7 stages over 3 days!