Well, thy partied until 5:00. At this point I was so tired that I could barely get to sleep. I would guess about 3 hours.
About the ideas:
The earplugs dont work since the bass goes right thru them. Of course noise removing headphones, but the stores were all closed at 3:00AM.
Good idea with the sex cartoon

. I would have to wait another year just to get my revenge.
I would love to play some loud music now, but there are some nice ladies across the hall I wouldnt want to disturb in the payback process. Plus, the girlfriend wouldnt let me do it.
I do have an idea. The door to the basement has a note on it that says to close it quietly, otherwise it slams real nice on its own

We want to clean up the place today, so I will need to go in the basement several times. Hopefully he comes out to bitch about it. I will say, 'Sorry, I didnt see the sign, I guess I was too fucking tired listening to Karaoke all fucking night'