As with everything, it's not going to be simple.
Someone above mentioned temperature checks. They could do that at the door, and that might help matters. It could also be a way of preliminary testing people, and possibly alerting them to the fact they need to have a proper test. That might help make people inside feel easier as well.
I don't feel uneasy about going back myself, but I do like my rare trips to the cinema. If they become a faff and more of a pain than an enjoyment, I'd have to reconsider even going.
It certainly isn't going to be simple - many of the same questions apply for returning our lot to the office (we're all working from home at the moment). It's a nightmare to co-ordinate.
And sorry if it seems that I'm singling you out (I'm not, I promise - I just happen to be in this thread, and I've seen it repeated a lot!) but temperature checks are not a useful method to screen people for having covid-19.
Yes, I know the Chinese authorities and other countries have been using temperature screening.
Yes, I agree it's probably better than nothing.
Yes, it may provide some (false) comfort to those going to the cinema. I get all of that.
But as a reliable indicator? No, for a variety of reasons.
First, people can be carriers and asymptomatic. Second, even if you're symptomatic, the "fever" stage of having a temperature doesn't last as long as the overall disease. But the main reason is that if you're feverish, most people will take some form of pain relief (such as paracetamol), which then suppresses the temperature anyway.
What that means is that
even if you have a fever from covid-19 right then, temperature screening won't flag you as a risk.
Happy trails, everyone!