The movie starts off by showing us how the four main characters were as teenagers in New York City, then fast forwards 50+ years to the present time and the occasion that Michael Douglas' character proposes to his much younger girlfriend and now plans to get married in Las Vegas, which provides an opportunity for the old gang to reunite in Sin City for a wild bachelor party.
I think in general the preview audience really liked the movie, lots of laughter at many of the scenes and no one left the movie early! But kidding aside, despite some scenes that were not first rate from the screenplay, the actors really make this movie and with a cast including four really experienced and very good actors, some weaknesses in the screenplay are easily overlooked. I would give this movie 4.5 out of 5 stars and will actually watch it again when it comes out on DVD. Love it!
If you want some free passes to movie previews, check out gofobo.com and sign up for movies in your area. I usually get about 5+ movies a years for the Triangle area in North Carolina and you can print out two passes for each event.