The best films for a group don't flatten the experience - they create one. You want something that generates opinions, debates, a reason to stay up later than planned.
The 2010s produced a generation of films that refused to be just one thing. Smarter than they needed to be. Better than expected.
A great documentary finds the universal in the specific. One person's story becomes everyone's story.
A first-ever look at the realities of the professional "amateur" porn world and the steady stream of 18-to-19-year old girls entering into it.
The best comedies don't try to be funny. They build worlds with such specificity that the humour arrives naturally. These films know that.
A great documentary is one you find yourself thinking about weeks later. These qualify.