Office parties

I am, thankfully, an outsider to corporate culture, except for a brief stint in the exciting world of temping. My ignorance, however, will -- alas! -- serve me in poor stead when I run a LARP later this summer.

So I ask you, dear reader: What happens at your office parties? (Include, say, team-building retreats and so forth.) What do you suppose would happen at an EVIL office party?