Casino is a totality of gambling activities accommodated in certain place and working under a special license.

The most popular game in a casino which mainly led to an increase of casino mania in the world is, of course, roulette as it is very easy to learn even for beginners and its players have a lot of betting variants. For example, they can select the exact number or the range of numbers as a bet; the color or whether the number expected to win is odd or even roulette wheel depending on the amount of zero numbers and the layout of the wheel itself: the winning number in roulette game is determined by the roulette wheel divided or numbered from 1 to 36. There are two versions of roulette wheel with a single zero and the wheel in the center of the table is called European or French style and the roulette wheel with a double zero and the wheel at the end of the table is called American one.

As in every game, odds have a big importance and in the roulette where roulette odds are a ratio of winning of definite number to the number of possible losses of the same bet.

One of factors that also maintain the popularity of the roulette game is that almost every casino offers some roulette bonus both to new and already existing clients. This also refers to the online casinos also called internet or virtual ones where the chances of winning in online roulette are mostly the same as in the “real” casino about what the online roulette guide will never forget to remind the player in order to attract more and more new ones.