The original Moondog Coronation Ball was a concert organized by DJ Alan Freed in Cleveland in 1952 as a special event for his radio show. The concert was revived in 1992 by another Cleveland radio station and is now an annual event featuring old rock and roll groups. So - I live in NE Ohio but had no idea where the name "Moondog" came from until I read the comments on this quiz today. ;)
Might seem pedantic but I wasn't sure whether we were looking for someone who was 11 years old, had been playing for 11 years or if eleven year was the name of a type of piano, etc
Thanks for the memories, QM.