1.) All you can eat buffets ARE the product, not a loss leader, so there's no bundle there.

2.) Early bird specials, again, aren't loss leaders. They're a way to get sales on the left side of the bell curve. The restaurant food is still the product, not a subsidy.

3.) Free soda with large fry doesn't actually exist (though it sounds like it should, right?)

4.) Happy hour wings (again, see #2)

None of these are bundling so I don't really get why you bothered to comment