So, here's some details, now that I'm secluded (for the most part):
On the 31st, everyone in the house starts drinking at around 9, in preparation for the new year. There are four guys and at the time five girls (some of the girls had a friend come up for new year's). Some of us get in the hot tub clothed and watch Superbad on the TV right inside the door. I proceed to get completely drunk. 12 rolls around, and I'm running all over the house screaming "Happy New Year Mother Fuckers!", still with my swimming trunks on. I sober up slightly, and one of the guys goes to bed. His loss.
This, my friends, is where the story really begins.
So, (and I don't remember how) all of a sudden, while some of the people are downstairs near the hot tub, two of the girls take their tops off and get in the hot tub. At this point, I was starting to sober up, and I was questioning if I should get naked and join them. They invited me, so I decided I would. We probably sat in there for about two hours. At one point, this one really attractive girl decided that she would test how long she could stay underwater. This wasn't a great idea. I ended up grabbing her around the waist, saying something like "I'm not intentionally trying to grab your tits but you are going to drown"

So, this girl eventually gets out, and one of the guys and another one of the girls decide to join us in the hot tub. At this point, the girl that has been in here the longest suggests that me and the new arrival make out, because, fuck, it's fucking new years. That rapidly changes into a thirty minute make out session of epic proportions. Lots of fingering and stroking. At this point, we get out and go fuck on the couch. The only down side is that the guy who went to bed first decided to come out of his bedroom while we were fucking. That basically ended it, but we were fucking for like 15-20 minutes at that point, so it wasn't a big deal.
All in all, a good evening.