A friend's dad recently passed away due to a smoking related disease. Most of the guys in the previous generation thought smoking was cool and are now paying the price. In the same way, the present generation thinks drinking alcohol is being cool and a teetotaler is considered uncool and a "pazham". Well, please know that drinking alcohol is totally uncool. If you think otherwise, all you would be doing by continuing to drink alcohol is you will make your spouse and children immensely suffer in a decade or two. So stop drinking!
And if you happen to have a friend who's a teetotaler and you're on your way pestering him to drink, please stop doing it. You are doing no good to him; you're not being a friend.
I am lucky that way. During my college days, there is probably not a bar in Mangalore that I had not visited with friends. Yet, not once have my friends suggested that I should taste alcohol. Once, an acquaintance asked me to drink and all my friends were pretty pissed off at him for asking me to drink. I am so proud of my friends that I keep telling about them to everyone.
Friendship is not just about enjoying and having a good time together. It is about ensuring that your friend always goes a step ahead in life. It is fine if you cannot help him or her; at least don't shove him down the rabbit hole.