The first casino gambling game that you come across either in online casinos or in brick and mortar casinos is roulette and the gambling game is either near the entrance or in the case of an online casino with a direct link from the home page which shows how popular the game is. Many Irish online gambling lovers who are casino players prefer casino slots of which there is a vast choice but others will say it is difficult to follow when they have won but when gambling on roulette it is very simple which is what makes it exciting. To play roulette at an online casino, all you need to do is place your bets on any number or combination of numbers and wait for the spin of the wheel to determine the winning number. You can decide on the size of your bet by clicking on the relevant coin on the display and incidentally you do not have to have to be gambling the same bet size for every bet on a spin, it is permissible for example to place a €20 bet on red or black and a few €1 or €2 bets on individual numbers provided that you remain within the max and min parameters of the roulette table. The odds of winning at online roulette gambling are actually quite good as the only advantage to the house is the fact that there is a zero which means a total of 37 numbers whereas a single number pays odds of 35:1 so the house margin at roulette gambling is less than 3%. Beware online casinos that offer gambling on American roulette as those tables have a double zero as well as a single zero meaning that there are 38 numbers but the odds are still 35:1 on a single number. This may not sound much but it has the effect of increasing the house margin from less than 3% to nearer 5.5% so stick to gambling on European roulette if you have the choice.