Incidentally, my favorite brunches always occur when I'm hosting out-of-town guests, or I'm visiting friends in another city, and we've stayed up too late talking and sipping whiskey or red wine, and the combination of a mild hangover and a caffeine buzz creates a mood that is both lazy and giddy. That makes me so happy. (I also really like eggs.)
Here are some songs that qualify:
You see what I mean? Other "brunch music classics" include Red House Painters and Beth Orton.