I'd prefer to be a player rather than GM and prefer Sunday to weekday nights. Saturday would require rescheduling or cancellations. And now a quote.
What is Chaos? Suffering, you might say. Oppression. Deceit. But could not all these things be said of your Imperium? You hunt down the talented and the strong-willed. You break them or sacrifice them. You lie to your citizens and wage war on those who dare speak out. The inquisitors you call masters assume guilt and execute millions on a whim. And why? Why do you do this? Because you know Chaos is there but you do not know how to fight it, so you crush your own citizens for fear that they might aid the Enemy. The Imperium suffers because of Chaos. No matter how hard you fight, that will never change. Chaos exists in a state of permanent victory over you - you dance to our tune, mortal one, you butcher and torture and repress one another because the gods of the warp require you to. The Imperium is founded on Chaos. My lord Tzeentch won your war a long, long time ago.
-Ghargatuloth, Daemon Prince of Tzeentch-