Synonym for hare-brained scheme to lose your hotel room in Vegas.

That said, here is the mathematical way to win at roulette: Bonus: Written in pseudo-BASIC!

10 tablemin = 5
20 bet = tablemin
30 bet on black
40 if WIN then goto 100
50 if LOSE then bet = bet * 3
60 goto 30
100 go home

The point here is that eventually, by the law of averages the ball will land on black. If it doesn't, you must double your bet to break even or triple it to make money.

However, the reality of it is that the law of averages is bullshit, and if you run into the table limit before you hit black, you are out a lot of money.