Walking out of casino drunk
I think it would be great if you left a casino fully drunk. Maxed out and can't buy anymore if there is a chance you could be arrested for public intoxication. It could cost a few chips to get out of jail or maybe even having to have friends to "bail" you out.

-
Cowtoon commented
But only if the bar they were at doesn't have a coffee bar. I started yesterday and drank madly -- > to level, but got cut off. It then took me forever to find a coffee bar. Casinos with both drinks and coffee service allows a player to gain (what helps them level) by drinking and sobering up. Perhaps consider making it impossible for them to play until they've sobered up (a short time period or ... they need to find a coffee machine).