Movie marathon question

My advice? Be frugal on your own time. Going out is for going all out-- if you're treating yourself to the marathon, go the full nine and treat yourself to whatever refreshments you require as well. If you actually needed to save money, you would have stayed home. Otherwise, don't fetter your pleasure excursions with penny-pinching and live a little.

Don't sneak it in, just buffer up beforehand. Ie. have a good solid meal that'll last you 6 hours. Then you won't be worrying about popcorn, candies or other snack foods.