If you have ever played Roulette you know that there is a certain period of time, in which players are allowed to make bets. Traditionally players are given about 60 seconds in between each spin to make bets. Players have a few seconds after the dealer spins the wheel. No more bets can be made after the dealer says “no more bets”. When the balls drops into a slot on the roulette wheel, the dealer will place a marker on the table that corresponds with the slot that the ball dropped into. He then removes all of the losing bets. Then the winning bets are paid off and the dealer removes the market from the Roulette table. After the stop of the ball nobody is allowed to touch the chips. Otherwise he can be femoved from the table. Above all else, just be courteous. Make sure that you are respectful to the dealer and the people around you, and also offer the dealer a small tip every 10th spin or so. The last advice here is avoid drinking alchocol.

One of the most popular betting systems in roulette is the Martingale. It varies greatly. The principle is following: when you win, you pocket your bet. But when you lose, you double the size of your previous bet.If you win that will guarantee you get back your previous loss and one more unit.And so on.
The Martingale System is effective only if you have an infinite bankroll and no betting limits.
The d'Alembert system is also rather popular. 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.