The Setsugetsuka is a Japanese all-female revue which is currently performing. The screencaps below were made from a home video taken of a performance of their 2006 show Relieved Heart; the Setsugetsuka allows fans to film performances. Thank you to Junklover for getting me a copy!
I know what you're thinking. You're thinking, "What song would inspire a doctor in a white cassock to go John Travolta while nurses and patients dance backup in front of a neon Red Cross symbol?" The answer is "Beat It".
Setsugetsuka official site.