Aria has its own coffee shop near the entrance from the self-parking garage called The Roasted Bean. Although this is the same Roasted Bean brand as it is in the Mirage (hence it was carried over), I find this to be a little bit nicer. Perhaps because it is newer, and perhaps because they charge more but the pastries / muffins and the coffee here just taste better for some reason despite being only a few doors away from the Mirage.
The coffee is expensive, two soy lattes (one small, one large iced) will cost you a whooping $13+ some change. If you want a muffin, it will cost you $4+ some change. This is not a place for the light hearted coffee drinker. You have to love. your. coffee. and need it badly enough to pay for it here when you can easily find an Illy in Palazzo or Coffee Bean in the Venetian.
However, the staff was friendly, the coffee was good (they serve Illy coffee here ... "premium" I suppose) and despite the price, no complaints.