Continuing two previous vids worth of theme on The Happy Page: It’s not the name of the song, but it is the name of the movie. A movie released exactly 42 years ago tomorrow in 1979 which is based on a Broadway musical that premiered in 1967.
I don’t want to say this clip is NSFW because everyone dancing has (most of) their clothes on, but if you’re at work…yeah maybe wait until you get home to watch it? Because you can’t tell me that one dance sequence wasn’t choreographed to evoke the concept of ‘free love’ and HR would probably take a rather dim view of that during working hours.