If he knows Nancy, and he does, there'll be no shortage of alcohol. Food on the other hand, it could go either way. He doesn't really want to cook for a bunch of assholes and Nancy though, so he's brought a salad. It's a fucking good salad and there's a lot of it, but it's... It's still a salad.

He lets himself in, because that's just the kind of guy Eames is, perfectly on time and brings the food through to the kitchen. Maybe he's being a little nosy too, who's to say.

(He is, he totally is.)