Among all the casino games roulette is classic. Roulette is an obligatory element, along with blackjack and craps,in any full service casino in the United States, but in France it's much more popular as roulette is a cultural and historical part of the gambling scene. In Europe people have been playing roulette since the 18th century and nowadays online roulette games are popular all over the world.Since at least 1796 when it was played in Paris roulette exists in the same form. Roulette comes from multiple other games. In the early 18th century in France was popular "biribi" - an italian ball game which was combined with another wheel game where colors, not numbers were used. "Roly-poly" was an English game launched in 1720 which consisted of black and white slots. So we can consider roulette a fusion of birib and Roly-poly.To understand a game is to enjoy it.Only in case you understand game you can enjoy it. And it's the amount of pleasure you take away from the tables but not your odds will increase due to the knowledge of the game.

In roulette everything depends on luck. There is little you can do from a strategic point of view other than trying to keep the house edge to a minimum. Casinos often have special rules which directly affect on the edge.
The 'surrender' option is the first strategy to know. This rule is applied to outside bets such as odd/even, red/black, and high/low. If the balls lands on the 0 or the 00 you only lose half your bet, rather than the whole betting. The house edge considerably depends on this;after all it is the 0 and 00 which account for the high house edge in the first place. Of course, the payoffs aren't as great for outside bets, but simply by finding a table with the ‘surrender' rule, you are improving your odds substantially.
Rather interesting point is the 0 and 00. You better look for one 0 tables, which are called European tables. Such tables which were primarily found in Europe offer a much more attractive house edge from the player's point of view. The house edge is reduced from 5.26% to 2.7% when you play on a European table. Physically European roulette tables are found more often in Europe, but in the ‘online world’ gambling they are just a click away.

The Martingale is the best-known roulette betting system. There are a great number of variations of it. You should follow such principle: if you win, then pocket your bet. But when you lose, you double the size of your previous bet.By doing this in case you win, you get back your previous loss and one more unit.And so on.
The Martingale System works great only in case you have an infinite bankroll and no betting limits.
Another popular roulette system is the d'Alembert system. The system is based on the assumption that after a win you are less likely to win again.So after a win, you subtract a chip from your bet. The d'Alembert system also assumes that you are less likely to lose after a losing spin, so in that case, you add a chip to your bet. The fact that the roulette wheel has no memory and each spin is an independent trial with exactly the same odds of a win or loss is the previous spin is a weak point of the system.

The numbers 1 through 36 are divided evenly among red and black "pockets" on the Roulette wheel. The ball will land in one of the pockets. The Roulette wheel also has on or two green pockets. The green pockets has numbers 0 and 00 or only 00, depending on the kind of Roulette.
A roulette dealer (usually referred to as "croupier") spins the wheel counter clockwise and releases what is usually a plastic ball along the track that runs along the top of the wheel's cavity. As the wheel loses velocity the ball is pulled down off of the track and bounces around until it settles into a pocket.