I don't know if they're guilty pleasures as much as music that makes people around me do this.

Ace of Bass
Captain Jack
Die Antwoord
Boston
Asia
all that 80's hair metal (Whitesnake, Great White, etc.)
Scandal/Patty Smyth
a lot of ska
Robert Miles
Beastie Boys
Atari Teenage Riot

I can't remember them all.