My son is also a non-drinker. Has no interest in it. It may change but as of now he has not tried alcohol. The school has a reputation for drinking. Mostly out of boredom I would guess.
It can get tricky when you join sports clubs. Many of the boys will drink on weekends so you might feel a bit out of it unless your ok at partying in the dorms while not drinking. It takes a strong person to attend drunken dorm parties and stay sober. My son chooses to avoid those situations. He keeps it strictly professional.