VladG said:
Right now the enforcement is "hey you're on something you're going to jail, and if we find some of the stuff on you, you're going to jail for a longer time."
You're going to have to spend money training officers to not only recognize the various highs people are on, like I said test will have to be created to check people on the field. That is going to cost a good chunk of change, you can't just drag everyone in for a blood test. And even then what do you do for a case where someone blows under the limit for alcohol and then does whatever test and they're under the limit for say marijuana, but the combination clearly has them severely intoxicated. The enforcement now wouldn't be enough/suitable for the new situation.
And what kind of controlled environment do you propose for a wide variety of drugs? I sure as shit would not want to be the owner of a bar who has a bunch of people hopped up on coke or a bunch of people freaking the fuck out on acid. Even then at least with some of the "lighter" drugs like alcohol or pot you can have a bit and still function and people can be on their merry way. But I don't think there is such a thing as a small hit of the harder drugs, what kind of facility can you provide for people who choose the harder drugs? Or do you trust them to do it in their homes and not be a menace?
Even then who says that any decent place will even take up the harder drugs, a normal bar might take up weed, but they probably won't tough the rest with a 10 foot pole. And this will probably mean that the places that take it up will be pretty scummy places that are more than happy to take the cash, distribute, and let the people out on the street.