Inside Bets: A bet placed in roulette using any number or any small combination of numbers.

Inside Straight: A straight that can only be completed one way when a player has four of the five cards needed in poker.

Insurance: Only offered when the dealer has a face up ace. A side bet is made when a player thinks that the dealer has a natural blackjack. If the dealer does have blackjack you win double, if not you lose.