The red/black poker betting fun is a form of Martingale (double up on successive bets) system and is one of the better known roulette systems around. Your bets for this poker betting fun are on either red or black, with your pay out 1 to 1 (ie double your money for a win). It is worth bearing in mind that your chances of winning each bet are just under 50/50 (remember the 0 and 00 that gives the casino its advantage).