Since this is an "advanced" class I was also considering Owner of a Lonely Heart by Yes which is more challenging, but a bit high for my range (despite being sung by a male on the original). I did transcribe it for my intermediate class at Blue Bear this spring, but we had enough songs already so didn't work on that one.
Does anyone who's heard me sing (karaoke, etc.) have any suggestions? It should be something that a small band could play, not dependent on horns or keyboards.