Bucky's smile isn't quite what it used to be, but - over the months - he's learned to get by as he is now. And that means to pretend that things are how they used to be, even for little bits at a time. His eyebrows go up in a friendly manner.

"Double that coffee, sweetheart. You got any pancakes goin' this morning?"

"Sure do. Bacon for you, too?"

"Sausages. Please. I'd ask for extra syrup, but I don't think this place has any trouble with bein' sweet enough."

The waitress actually blushes, and Bucky moderates his smirk to avoid evoking her wrath, instead. He likes the good mood plenty better. Then he leans back, letting Peggy take her pick, too. Maybe he's going to deflate with the effort of brightness and normalcy as soon as the woman's back is turned, but, for now, the knowledge that he can at least fake it still? Is good to him.