I dont think its that they know how to party, its more that they need a time when they can let out all that pent up repression and frustration. Alcohol is the only way they can figure to be a bit human, only they have no way of controlling it, and they always go too far (which from the outside might pass as having a good party).
I always hated being at Borg parties (like I got invited to that many!).
GBL I wouldnt mind cracking a beer with you though .