I think you're overestimating the "want to participate in an event" thing. I don't think most people want to hang out with strangers in a theater. They do it because they have to.
Sure, people want to get out of the house. The theater experience has perks and its rituals that are nice. I'm not saying there is no place for movie theaters any more. I just don't think it's the preference for most people on most occasions.