Spugs, You'll have no problem with people thinking you are religious nut just because you don't drink or smoke.
However, from reading your post, you might have problems with people thinking you are an all-round nut. TIFC (This is f****** China) though, so you'll blend right in.
Not drinking at the saloon can easily be overcome buy buying rounds for the rest of us. Since you don't drink any more and it could be uncomfortable for you to buy drinks, I'll take care of this annoyance for you. Just give me all your money and everything will be smoooooth sailing.