I've actually been lucky enough to visit 2 theaters that were basically restaurants. Instead of rows of seats it had booths and tables where the staff would come and take your order. It was typically the "2nd running" of movies (older movies that have been taken out of theaters but not yet released) and would be a double feature for under $10. Definitely was an awesome experience and I hope there still open since this seems like an answer to the whole "we have to sell food at x2 the price" problem.

Went to a cinema experience not so long ago where you could order hot pizza and cold beer via SMS during a movie. It had a whole menu for very reasonable prices. And they delivered right to your seat.

The seats were setup so the staff could sneak through the isles without disturbing the rest of the public.