I am sort of the same. I see these things as forced fun. And anyway, does anyone actually care about new year any more? Its just another day. Well it is to us. We dont even stay up till midnight usually anymore. It just signifies the end of the xmas holidays and a close return to the grind of work.
On saying that, surely you wouldnt jump into the pool unless you were very drunk?
The only ones who would do it sober are surely exhibitionists who crave to be the centre of attention. Plenty of them about mind.