Article in Wired about the best party game of all time, Mafia (or Werewolf):

If you want to play Werewolf well, you have to draw on a wide skill-set. First comes memory. It’s not always easy — particularly at 2am — to remember who accused whom and how everyone voted, but this is crucial for spotting patterns. And you need meticulous observational skills; note someone drumming their fingers or fiddling with their collar, and you have the “evidence” to back up whatever theory you’re selling. Then there are concrete observational cues — who’s making eye contact with whom? Has somebody slipped up by saying a werewolf has been lynched, when only a fellow werewolf could know that?