<p>To put it plainly, marijuana use is not very prevalent here: I think the 5-10% figure offered above is correct. In any case, it’s definitely not as prevalent as at your typical public university. So if you don’t like to blaze, Harvard is a good place for you. If you do, I’d recommend Columbia University or (if you’re willing to take a step down the prestige ladder) Eugene Lang College at the New School. Or just join a frat: they usually have their own trusted dealers.</p>