"Do you not drink?" [I'm just enjoying an iced tea, why do you care?]
"Why don't you drink?" [What makes you think that the answer to this question is likely to be a pleasant one?]
"You must think I'm an alcoholic." [...Well, I didn't until you projected your own insecurities onto me just now.]
"Would you like a beer? Oh my God I forgot, I'm so sorry!!!" [You were just being polite and offering me something. Relax.]
"This beer is really good, you should try one!" [ONLY annoying if the person has been hanging out with me for years and still has no idea that I don't drink.]
"You know, there are some health benefits to red wine."
"We're gonna get you wasted! Haha j/k."
"You'd be having a lot more fun if you were drinking!" [This one hasn't happened to me in awhile but I generally consider it as license to flip out and yell at the person. Yes, I can flip out and yell at people.]
"Anyone who doesn't drink for non-religious reasons is LAME. Oh, sorry, forgot you were here."
Luckily in my current social situation I don't have to put up with any of this, but all of these are taken directly from things people have said to me in the past.