1. You should do it where it won't be noticeable. Other than that, I don't know what to tell you.
- "other than that" here means "beside that", right? Yes.
2. Why is it so hard to french kiss someone?
- In my dictionary, "french kiss" is noun, not verb, but why do we use it as a verb here? Nouns can be frequently verbified.
3. A: Hey man! what's your pleasure today?
B: I don't wanna drink anything today.
- " What's your pleasure today" here means "would you like something to drink today?", right?
No, it's what would you like to drink/order.