Huh, space marines actually get free time. Wonder what the Chaos Space marines do when they're not rampaging/torturing slaves.

Death Guard hop on a scale and frown
Night Lords hide in their rooms, turn off the lights, and act like Batman
Thousand Son's read books and try to stop their heads from exploding
Alpha Legion sit around a table and play RISK all day
World Eaters pound their heads against each other and scream
Iron Warriors assemble card board box forts and sit in them
Word Bearer's summon daemons for the lulz
Emperor's Children listen to music and pass a bong around
Son's of Horus compete with Ultramarines on who's awesomer