The Orphelins bet in roulette is a type of call bet that covers a group of 8 numbers that are not part of the "Voisins du Zero or Tiers du Cylindre sections. The name Orphelins translates to orphans, as the numbers it covers are somewhat isolated on the wheel. The bet includes the numbers 1, 6, 9, 14, 17, 20, 31, and 34. Players make a combination of straight-up, split, and corner bets to cover these numbers. The Orphelins bet is popular in French and European roulette, offering a strategic way to wager on a specific set of numbers that are spread out across the wheel.