People all dressed up as animals in a bar! Getting up to crazy stuff but then like turning back human and then animal again!

Leona Lewis - Forgive Me

I thought a similar concept of a video.

Leona Lewis - Forgive Me: I imagine it as a black and white video about Leona sitting and walking around, but everytime the chorus kicks in she is in a red room performing the song.

Nine Inch Nails - The Collector