The number of teams that can be included in a Round-Robin bet depends on the number of selections desired by the bettor. A Round-Robin bet is a type of parlay bet that allows bettors to make multiple bets on a group of teams, with every possible combination. For example, if a bettor selects three teams, he can bet on all possible two-team combinations, which would result in three separate bets. If he selects four teams, he can bet on all possible three-team combinations, resulting in four separate bets. Therefore, the number of teams included in a Round-Robin bet will always be one less than the number of selections desired by the bettor.