I think pancakes are awful for a large group. You can only make one (maybe two) at a time so it takes a while. Eggs and yogurt are our typical breakfast foods. We did do pancakes once - haven't done it ever since.

Everything else, we really don't change what we do from when its just two of us to 10 of us. Deli or burgers/dogs/chicken for lunch, dinner we often grill (fish, burgers, steak) or make tacos or spaghetti.. easy stuff that's simple for small or large groups. Dinners are also what we tend to eat out most frequently for.