If you're looking for the perfect movie for date night then The Hangover is what you want to see. This hilarious story of a bachelor party gone bad will have both you and your fiance rolling in the aisles.
Now since this film revolves around a wedding I watched it for both enjoyment and for blog research. I don't want to give away anything so here's the one extremely important tip that I took away from it that you definitely want to follow: Do not have the bachelor/bachelorette party the night or two before the wedding, especially if it will be out of town. In fact I would say the closest you should get to the wedding date would be the weekend before, but I recommend two weekends before.
You would think that most people would know not to have a wild night the day or two before the wedding. Who wants to risk a hangover the morning of their wedding or worse, if you're planning an out-of-town party you could be delayed by traffic or a cancelled flight. (Don't worry I didn't give anything away.)
While I'm pretty sure the crazy events that take place in The Hangover will not happen at your fiance's bachelor party, you don't really want to take a chance that the groom (and his groomsmen) may not make the wedding because of one wild night.
PS - I don't usually rate movies, but I have to say this one you definitely want to see.