Let's just be honest: Marijuana and college go hand in hand. Most people don't smoke enough to fail out or get kicked out, but casual usage at parties or after big exams definitely happens. The general consensus among students is that it isn't really that big of a deal, and many can take it or leave it. The same is usually true for mushrooms, popular prescription pills, and underage drinking. They are all pretty easy to find if you want them, but definitely easy to avoid if drugs aren't your style. After all, the University is not thought of as a party school or being full of burnouts.
Be warned, though: UNCG Police operate under a zero tolerance policy for drugs and underage drinking, and have a reputation for being quick to search dorms, personal property, and cars based on tips or simply suspicion. Apparently, they don't just let you off with a slap on the wrist, either, so it's best to be smart about it. However, most students who use know the best ways to go about it, so if you're looking to get into this scene, just keep your eyes peeled and you'll fall in with the right crowd.