I think that the other respondent has given you quite a good answer, as given in, http://www.italki.com/answers/question/69305.htm In my personal point of view, the question should be rewritten as, "Si vous aimez la vie de soirée au debut, elle vous donnera de bonne humeur." The translation would be, "If you like the nightlife at the very beginning, she (i.e., the nightlife) will give me a good mood (or: good sense of humor)." Bonne journée. / Good day.

This is my translation: "If you want the life of (I don't know soirere) to begin, she has to give you the good sniff." haha; doesn't make sense to me either.