Right now, I'm only gaming online (live groups - the one thing I miss about college). So, I've had actual dinners, though I'm the only person partaking. But during live games I've had...
-Pizza. Numerous times.
-Burgers, dogs, chicken fingers, fries, onion rings, etc. Typical fast food.
-Pretzels, chips, candy, cookies and gummy bears... basically, whatever folks felt like grabbing from the junk food at the school store.
-Brownies, fresh-baked cookies, and cake. Stuff that a real human being baked, as opposed to Oreos and Chips Ahoy, in other words.
-Pepsi and Mt. Dew. So very, very much Pepsi and Mt. Dew.
-Fruit. As many as six oranges in one session. I like oranges.
-Subs. So, sandwiches, but really a separate category, or perhaps, dare I say it, a subcategory.
-On a related note, I have had people try and feed me such varied foods as a sock and knuckle sandwiches because of my puns. I can't say I truly blame them.
I don't think I've ever been in a group that did anything particularly 'healthy', beyond someone having fruit or something similar to snack on. Nor did we ever do a 'real' dinner, beyond grabbing burgers or subs or ordering pizza.