I'm always amazed by how many words journalists manage to write about a something without actually stating what it is. Here are the rules of the actual game, as

I'm always amazed by how many words journalists manage to write about a something without actually stating what it is. Here are the rules of the actual game, as explained in the linked PDF: "A bar game involves three players, each of whom reveals either a clenched fist or an open hand; they do so simultaneously, by the usual ‘three shakes method’. "A person ‘wins’ this game if he or she reveals a hand that differs from what the other two players present, in which case the latter two ‘lose'. Otherwise (i.e., if all three reveal a clenched fist, or all reveal an open hand) the game is a ‘draw’. "Suppose each player decides his or her strategy independently, and chooses between the two strategies with equal probability. If there is a winner, this player must drink a glass of tequila, while each of the two losers is required to toss a fair coin, and drink a glass of tequila precisely if the toss lands heads. If the game ends in a draw, then each player independently rolls a fair six-sided die and if the number that comes up is a 3 or a 6 that person drinks a glass of tequila."