8 .
After the big event, your friends suggest moving on to visit a place where you know you should not go, or where you might feel uncomfortable (a casino perhaps, or somewhere that there might be alcohol or drugs, or some other activity that you don't believe in or approve of). What can you say politely, at this point?
No, no , no, please no, anything else but that ... that's horrible and disgusting.
I'm very sorry, but I can't go in there with you. It's something that I never do; I would not be comfortable.
What, going in there? You must be joking! I'd never do that sort of thing! Leave me out of this!
This is very kind of you, I'm sure; but I really can't go in, I'm afraid. I hope you'll understand if I wait for you outside.
Answers 2 and 3 are rather too formal and exaggerated (and hard to remember), even if this is more like what you might want to say in your first language.
Answer 4, by contrast, is rather too down-beat and 'cool'; it isn't quite polite enough.