Everyone is searching for ways to win at roulette. Unfortunately, like all casino games, in the long run, roulette makes money for the casino, not for the player. If this wasn't so, would casinos offer the game? Yet, for over two centuries, people have been trying to invent schemes that will beat the wheel. There are hundreds of roulette systems out there, some of them being sold for $1,000 and more. Don't waste your money; there is no such thing as an infallible roulette system.
So is it impossible to win columns roulette strategy at roulette? No, it's not impossible; you can win in the short term, just don't plan on earning a living playing the game. It helps if you always make sure the odds are as much as possible in your favor. To that end, never play "American" roulette, where the wheel has 0 and 00 slots. European (or French) roulette wheels have 37 slots with only a single 0. That extra (00) slot on the American wheel gives the casino a 5.26% advantage, whereas on the European wheel the casino advantage is only 2.7%. Practically all online gambling venues offer single-zero roulette, whereas such games are scarce in live casinos in North America.

Despite what I said about systems, above, if you expect to win playing roulette, you should utilize a system or strategy of some kind. Trusting Lady Luck alone is not enough. Occasionally you can win solely by pure luck, but with systematic betting you're more likely to give Lady Luck a helping hand. And remember that any gambling activity has a better chance of success if it's pursued with concentration, practice, patience and good gambling intelligence.
No system is foolproof, but having a betting method is better than playing haphazardly. The roulette strategy I give you here has worked for me more often than not. If you exercise care and alertness, it should work for you too.
Two Dozen Roulette Method
If you use this betting method on a single zero table, with every spin you have 24 chances to win, against 13 chances to lose. You are covering 24 numbers, leaving 0 and 12 other numbers open. All things being equal, you should win nearly twice as many spins than what you lose.
I suggest you start with 10 betting units (chips) of a value you can easily afford. Your aim will be to win 5 units. If your chip value is $10, you're starting with $100; win 5 units and you've made a profit of $50.
The roulette table is divided into three 12-number fields (1st. 2nd. and 3rd 12) and three columns with 12 numbers each. Pick any two of the dozen fields or any two of the columns and bet on those. It is very important that you do not "mix and match"; because if you make a dozen and a column bet at the same time, then four numbers will overlap and your winning chances are reduced to 20 to 17, instead of 24 to 13.
So, to start, pick two columns or two of the dozen fields and wager one chip on each. Dozen bets pay 2 to 1. If you bet one chip and win, you collect 3 chips, the win pays two chips plus you get back your original bet. You're wagering one chip on each of two dozen numbers. If the ball lands on one of the dozens, you collect 3 chips, giving you a profit of one chip.
Here is how you aim to win 5 units (chips):
If you win the first two rounds, you're ahead by 2 chips. In round 3 you bet 4 chips, two on each dozen.
Win again and you'll be ahead by 4 chips. Next round you bet 1 chip on each dozen and if you win you'll have made your profit of 5 chips.
Never risk more than two of your own chips per spin. Make a bigger bet only if you can do so with chips that you have won. Any time you have a losing round, start over by betting one chip per dozen and hope to get a 4-spin winning streak going. In roulette it is not uncommon to win or lose four consecutive spins, that's why you should aim for four straight wins, but quit if you lose two spins in a row.