Knife gambling is the worst kind, but also the most rewarding. That’s the kind where each of the games is run by a large, talking, anthropomorphic Knife or Blade. He (usually a he) deals the cards and calls the numbers and counts the chips. And when you lose, he takes your palm and makes a deep lasting gouge. He aims to scar.
Some of these knife-men have mustaches, which is odd considering they share no other mammalian traits.