As was said, you do not need love to have a functional society. The strongest gives the orders, and whoever wants to keep breathing will follow them. Love does not enter into it.
As for spare time, well, loyalists, as has also been said, next to nothing.
Chaos can vary, though I would think they practise as well, though it probably always focuses on harming something. Chaos marines probably won't sit down to play "connect four" in between battles.
World Eaters: Probably hunting for something else to kill, killing each other.
Death Guard: Targeting some planet for a terrible sickness, plauge, or nasty cough causing agent. Or creating some of them.
Thousand Sons: Studying a magical tome, casting spells, or, in the case of rubrics, probably standing around.
Emperors Children: Something perverse that gives plesure, whatever they find enjoyable.
Night lords: Inventing new ways to scare the hell out of people, raiding for stuff.
Alpha Legion: Creating a Cult on their next target, training like mad
Word Bearers: Constructing Chaos temples, binding daemons to their will.
Iron Warriors: Constructing massive fortresses, modifying vehicles that they have looted, target practice.
Black Legion: Whatever they want, although they probably spend most of the time raiding the imperium, or doing whatever goes best with their patron.
These are just my guesses, though. If anyone has an actuall fluff-documented answer, listen to them.
