The World's End (2013)

This is a hard movie to categorize--it is part buddy movie recapturing a long past youth mixed improbably with a science fiction conspiracy/thriller movie.

The movie has a great case, led by Simon Pegg and Martin Freeman, and starts off as five men recreating an evening they had long ago.  Gary (Simon Pegg) is an alcoholic and drug user and chronic screwup, the sort of guy who lures his firends into joining adventures that tend to end in humiliation or disaster. He's first seen in a rehab facility, but either he hasn't been there long or the treatment hasn't kicked in for him, because he looks road weary.  First impressions are reinforced when all of his former compatriates are reluctant to join him or flat out refuse.
But Gary is undaunted-- "Why should getting older affect something as important as friendship?"  In the end, he prevails.

Gary's goal is to re-enact their great thwarted pub odyssey from 1990, when they resolved to hit all twelve nightspots in their old hometown of Newton Haven. The quiet little town is home to bars with mythologically and otherwise suggestively loaded names: The Two-Headed Dog, The Famous Cock, The Trusty Servant, The World's End. That the pals didn't finish their quest has always gnawed at Gary. He's obsessed with pinning a triumphant end on a long-unfinished story.  From the very start the group notics there has been a big change in the palces of their youth--they all look the same, for one thing, and they no longer serve ale of any quality.  Worse yet, they all look the same.

Then pretty suddenly the movie takes a sudden turn for the weird.  Not much to be said about it without spoiling the plot twist but suffice it to say that when it happens the group is already feeling
fears of assimilation and domestication and the loss of youthful fire.  They are also in various ways  feeling that while we should strive to be better, kinder, more mature people, we still are who we are, and if we cannot tolerate one another's frailties and treat each other decently, there's no hope for the species. The film has great fun positioning modern life itself as a prolonged and largely invisible conspiracy to rob people and their world of all personality.  Silly throughout, it actually has a more serious point to make.