4 or More
The deck of cards is dealt out to every player until there are no cards left in the deck. Then each player must drink based on what they were dealt.
The rules that you drink too are: Whoever was dealt the lowest card takes 4 drinks, for any two cards the same you drink that amount, for any three cards the same you drink 3x the value of the card, for anyone unlucky enough to get four of the same card does two shots of choice, whoever gets the Ace of spades has to take 5 drinks and whoever gets the Ace of hearts gets to nominate someone to take 5 drinks.
Whoever drinks the most that round gets to create a new rule for the game before starting again.