I know that Teh Juggernauts love the hip-hop, especially rhymes with some really weight behind them.
Headquarters usually has Immortal Technique, The Flobots, Sage Francis, or Greydon Square blasting through the main room.
Feministing recently posted the following video. The woman's name is Invincible, and she is rapping with Finale. The entire point of the video is to expose the gentrification of Detroit. The idea of rapping about local issues is pretty powerful, even if you don't completely agree with the message.
And... she goes to high schools in Detroit and talks with students about how to succeed. Hawt!