In one of my old groups, we tended to have a "day game" on the weekend, so our shared food was a few plates with a selection of cheeses, various meats, cracker biscuits and few other things like celery, carrot and fruit.
These were really good for snacking on during the game, and weren't overly bad for our health or anything.
Some of us brought sandwiches, or take out to go with it, but those were individual choices.
In a later group, we would decide to bring ingredients (pre-arranged the week before) like cold meats, salads (potato, leafy, bean, corn, or what ever) and breads. Of course sometimes it was easier just to have pizza, or have a smorgasbord of chinese food brought back to the house.
