Some Unsolicited Advice on How to Eat Better at Your Roleplaying Game Sessions
Generally, you want to buy from the supermarket, not the convenience store. Cheaper, better selection, and you go to the supermarket regularly anyway. Convenience stores are when you’re in a hurry.
If you have money, and your friends perhaps do not, I would recommend having a bit of an open hand when it comes to picking up stuff to eat. If you decide you’re going to be like that to begin with, you won’t feel imposed upon later. Besides, it’s nice to feed people.
If you don’t have that much money, don’t panic: you can still eat pretty well on a limited budget when you’re cooking for four to six. For example: brown up some ground beef. Drain the juice and saute a can of mushrooms in it. Mix together the two, then throw that in a Tupperware; take it to the game with egg noodles. Boil up the egg noodles; heat up the beef/mushrooms; combine, add sour cream, and voila! Beef Stroganoff, more or less. Or bake some lasagna. Or bring a loaf of sliced bread, cheese slices, and a stick of butter; ten minutes of work turns that into a pile of grilled cheese sandwiches.
If you have an absolutely favorite food that you never want to share with anybody, leave it at home.
Having a legitimate "may-I-borrow-your-EpiPen?" food allergy is something that you should should absolutely discuss with the rest of the gaming table. Anything less dire than that should probably be handled discreetly, if indeed it should really be brought up at all.
But most importantly: if you’re worried about any of this, now that I’ve brought it up? ...Relax. It doesn’t matter that you’re secretly pretending to be an adult: so are the rest of us. So is the rest of humanity, really. Don’t over-think this process: keep it as informal as possible. Just make sure that there’s enough for everybody of whatever you bring and it should eventually all work out.
But, really, no cheese puffs.