Phnom Penh, Cambodia
Not to be confused with neighboring Thailand, where a bag of grass could see you jailed for twenty to life, Cambodia doesn't really give a crap if you're stoned, drunk, or just being your ugly American self, so long as you're spending money. Treat yourself to a joint from around $1.50 at seedy bars, or sample the local delicacy “Happy Pizza”. But remember, weed is technically illegal here, so bribe money will come in handy should a cop take an interest in your smoke-shield.
Average cost of a gram: $4.00