The rules of the European Roulette have laid down 37 numbers, where 0 is for green, 18 numbers are red & the rest 18 are dark. Zero gives a house edge of almost 2.7%, where the probability of the ball to land on any square is 1/37. And if the player wins, he gets a payout of 35:1 along with the original amount.
Inside bets are particularly relativity based bets having larger risk carrying largest possible returns (except when the board has multiple within bets spread over it).
These bets are scattered bets having better odds with lower payoffs.
Important: Zero is not included in outside bets.
The majority of the bets are covered by the Inside and Outside bets. To know more about other kinds of bets in Roulette to gain knowledge about Roulette rules, you could read the special types of bets offered up by few casinos.
The best variant of Roulette that has been named 'French Roulette' features 2 rules, viz. 'En Prison' and 'la partage'! According to 'En Prison' rule one-half of the 'even bets' placed by you are given back to you if you spin a zero. The 'even money' bets include color bets, even and odd bets and high or low bets. This is very similar to 'la partage', the only difference is that after losing half of the bet, the player doesn't have a choice to quit.
According to the rules of the American Roulette, there are two zeros, which increase the benefit of the house to 5.4 percent. Playing American version of Roulette makes no sense, when you have got so many online casinos providing the European variant of this game.
A VIP table is offered at Intercasino for playing European Roulette, which features 'en prison' a French rule, wherein half of the outside bets placed by you are given back to you when you spin a zero, fetching you with 1.35% of house edge.