I don’t know who needs to hear this… : gambling
You can find the best gambling system, albeit for blackjack, merely by watching The Simpsons:
Bart Simpson : Dad, if you take me to Vegas, I’ll teach you how to cheat at blackjack.
Homer Simpson : Boy, you don’t need to cheat when you got a system.
Bart Simpson : What’s your system?
Homer Simpson : [whispering] I don’t tell your mother how much I’ve lost.