Are we human? Or are we dancer?

[DaveC426913]

I hear this song on a commercial about a dozen times a day. (by the Killers)

Is there any context in which the title text is grammatically correct? (I mean dancer without the 's').

 

[DaveC426913]

Ooh! I thought of one! (An equivalent)

We are reviewing a medical report told in first person.

Are we patient? Or are we doctor?