Okay, I was in Vegas recently, and did a little gambling at the Roulette wheel.
I do mean "a little" gambling, and only was wagering lunch money.

Each morning when I came down from the room into the casino before breakfast, I went over to the Roulette wheel.
I had $30 allotted for meals each day, so that's what I played with, to try to win money to cover my meals each day.
I played the highest odds, which were Red or Black. No numbers. Approximately 50% chance.
I watched the wheel until I saw 3 or 4  Black numbers come up in a row, and then put my bet on Red.
Sure enough, it worked almost all the time.
I bet all the money on one bet, and it payed off.
I then took that money and quit the wheel for that day, and used the money for meals.
I did that 4 days in a row, and won every time.
On my last day I kept doing the same process with the money I had left, and continued to win, and left with a couple hundred bucks in my pocket, ahead of the game. I lost a couple times on the last day, but only bet a portion of the money on each bet that day. I won about 95% of the time.
Some people playing the numbers were looking at me like I had some kind of "magic touch". Almost every time that I bet, I won.

I couldn't bet alot of money, but if I had, I would have really walked away with a bundle.
I don't know if this was just "dumb luck" or not, but the idea was that a string of one color coming up could only last just "so long" and it had to change on the 50% odds after a string of one color coming up. I know that isn't the most scientific way of doing it, but it worked really good for me.