Harry hadn't even realised how hard old habits died. He immediately picked what he consciously thought of as a good table, not thinking of the strategy of it. He looked up when Hermione entered, not quite managing a full smile, but clearly pleased to see her.
"Hello, 'mione," he replied, noticing her ever-present bag. Knowing her it had more in it than just the three books she'd wanted to show him. He was surprisingly curious to take a look. The surprising part being that he wasn't grumbling about research. If Ron were there then, he'd probably be doing it for them both.
"I waited for you to before having anything. I haven't had much to eat yet so I'll probably be having something heavier than usual for lunch." In fact, he'd been looking at steak and chips and a butterbeer.