I dreamed I was working an overnight at the hospital, and rather than taking care of patients, the entire staff sang karaoke together, instead. LOUDLY.
The worst part is we were supposedly singing "Fernando" by ABBA, but even my subconscious doesn't know the song very well, so it was a mash-up of "Fernando" and "Mandy" by Barry Manilow.
Yeah, I vote "nightmare". My brain is seriously fucked up.