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I organize a group that has an overnighter at least once every two weeks. Kind of an off-shoot of a local cycling group. Everyone brings their own kit, but I'll usually bring the 'group cooking gear'. Largely I get to choose the route/destination, so I don't mind carrying a little extra.
It's usually: quarter pan rack (for a grate), pair of sturdy tongs, cutting board (1/4" hdpe one I made), 10" carbon steel pan ('turk pan'), and a towel w/ kamsnaps that wraps around it all (keeps them from rattling in my pannier). All of the metal stuff is Vollrath brand, from a local restaurant supply. Weight is maybe 7lbs total--nbd on a bike... and it's just an overnighter.
Anyways, we cook a bunch of stuff, but for larger groups / noob groups, sausages are foolproof. Kraut and mustard too, but buns are optional. A solid alternative is hot dogs (I like Nathan's), but then you gotta bring buns, etc.
The most basic way to cook them is pointy sticks. You can't really mess it up, and everyone feels like they're doing something.
An ex-camper got me hooked on a delicious little appetizer, very basic, but I can't imagine group camping without it now. It's just saltine crackers, a sliver of raw white onion, and cheddar cheese. Get good cheese, because everything else is so cheap. Cut the onion about as thin as you can, to keep it from being overpowering. You shouldn't really be able to feel it when you chew, certainly not enough onion to 'crunch'. Cheese is maybe 1/8" thick. Goes great with a beer or two, while you're waiting on the 'real food' to cook.
I assumed you were asking about dinner, because you mentioned drinking. The rack is useful in the morning too--there's room for the hot water (coffee), and often I'll cook eggs for those who want them. (A pot of rice for tkg has become a real crowd pleaser.)
Pic related, it's the kind of pan I bring.