1. Start with a lot of money/chips.
2. Bet low (like $1) on one color (black or red).
3. Continue to bet $1 on that same color every time you win.
4. Double your bet on that color every time you lose.
5. Walk away with money gained in your pocket at the end of the night.
Dude 2: I'm up $60 on roulette, but I've been here for 3 hours.
Dude 1: Ah...Bogdanovic method.