It goes on to say that the idea is to improve focus, concentration and stamina.
Let's see:
Marijuana -- makes me hungry, then sleepy, have been known to fall asleep while munching; focus is a bit strange (have you ever really really looked at the kings, I mean, like, wow!) -- not great for poker
Cocaine -- I dunno officially -- makes my friends all hyper, talky and cocky and makes them think they are very clever altho they sound pretty stoned & stupid to me -- none of this sounds like a good plan for poker
Amphetamines -- I dunno officially -- makes pals hyper and cranky, awake but thought processes are a bit off
Valium - sleepytime bigtime
Energy drinks, red bull, coffee, etc -- works good for awhile
Take breaks, take walks, stretch -- helps a lot, especially if you use the time to refocus and think
Having an attractive person either slap or tickle you -- wakes me right up