Voisins, Tiers, Orphelins

European roulette tables with race-track betting support three "call bets" — wagers on sections of the wheel (not sequences of numbers on the layout). Voisins du zéro ("neighbors of zero") — a 17-number bet covering zero + the numbers physically adjacent to it on the wheel: 22, 18, 29, 7, 28, 12, 35, 3, 26, 0, 32, 15, 19, 4, 21, 2, 25. Uses 9 chips. Edge: 2.70% (same as any single-zero roulette bet). Tiers du cylindre ("third of the wheel") — 12 numbers opposite zero: 27, 13, 36, 11, 30, 8, 23, 10, 5, 24, 16, 33. Uses 6 chips. Edge: 2.70%. Orphelins ("orphans") — the 8 numbers not covered by the other two: 1, 20, 14, 31, 9 on one side; 17, 34, 6 on the other. Uses 5 chips. Edge: 2.70%. The edge is the same as any other European wager — these bets don't lower it. They're a social signal (dealers recognize the call instantly + pay in specific chip denominations) and a way to spread multiple bets with one phrase. Pairs nicely with sector play in physics-prediction (the theoretical advantage play where you track wheel spin + ball velocity). Academic interest for most — a conversation piece at the table.