Kukui Grove Cinemas is a tiny theater compared to most, but being one of only two "major" theaters on Kauai, you can't grumble too much.
They usually have all the major films, and also include matinee and senior discounts (matinee only on the first show on Saturdays and Sundays). They also have a snack bar and restrooms (albeit dirty ones).
Pros: One of two theaters on Kauai, shows most major films
Cons: Small, dirty bathrooms, expensive snacks