L4w,
I personally wouldn't risk the chance of a random drug test, unless you have something to fall back on.
I've also never been remotely into any other kind of drugs. I'm British but spent a year at university in Iowa and this was the only time in my life I took marijuana. It wasn't for me. I've also never been interested in even trying anything else haven't even smoked a cigarette. Of all the drugs I have to go for the one with calories.
There are only really two things that give me the same pleasure as alcohol can/could. One of these is exercise and I have a tendency to go overboard with that too. I can drink for hours but can only exercise for at most two.