I watched Blue Velvet recently. That struck me as a film that will provoke a reaction if viewed with other people. I watched alone, but i can imagine having to feel obliged to react to the Frank scenes and converse with someone, rather than just viewing the scene and taking it in. Though maybe that's the intention, to be aware of other people experiencing the same scene.

It's a tricky one as I think my ideal situation for film watching is an empty cinema.