What's cool about renting is that you don't care about your house getting destroyed. So I think that is the number-one thing. Just going "Sure, you can jump off the roof. I think that's safe! Let's just paint on the walls! I bet the beer bottle will break before it shatters the window!" Not caring about the environment is a plus. And a ton of booze. And underage kids. That just ups the excitement value of the party, like, "Oh my God, we could all go to prison."