Part III: Business & Regulation · Gambling Mathematics & Probability

70. Team Play

Advantage Play

Team play in advantage gambling involves coordinated groups of players working together to overcome casino countermeasures and maximize collective profit from +EV opportunities. The most common form is blackjack card counting teams, where “spotters” play at multiple tables maintaining minimum bets while counting cards, and signal a “big player” (BP) to join and make large wagers only when the count is favorable. This structure allows the team to achieve high bet spreads without any single player attracting attention through dramatic bet variation. Famous teams include the MIT Blackjack Team, which operated from the 1980s through the early 2000s and was the subject of the book “Bringing Down the House” and the film “21.” Surveillance departments maintain databases of known advantage players and team members, sharing information across properties to detect coordinated play.

In practice

Team play roles include: Spotters (count and signal), Big Players (make large bets on positive counts), Gorillas (make bets without counting, following team signals), and Back-Spotters (observe from behind without sitting at the table). Team play is NOT illegal — it violates no laws — but casinos ban team play by ejecting identified members. Cross-property information sharing through databases like Griffin Book (now OSN) is a primary casino defense.

One entry from the Casino Industry Glossary — 1,157 terms written for surveillance, compliance and operations professionals rather than for players. Definitions describe industry usage; where a term carries a regulatory meaning, verify against the instrument that governs your jurisdiction.