If there are any.art theatres in your area, you might be able to support them via virtual theatre initiatives. Kinda cool, but definitely geared towards arthouse fare.
When you buy tickets online it automatically blocks out a certain number of seats on either side of yours, so nobody should be sitting too close together
Is going to a movie more important than the chance of becoming infected with COVID19? If you want to support them and potentially preserve your health buy a ticket and stay home.