This Kiva Han on Craig Street is a great little coffee shop. That said, I don't drink coffee, but the hot chocolate is good, and the smoothies are fresh made and top notch (I recommend the peach though Marissa prefers the strawberry-banana). They also have food which varies a bit but can provide a light lunch. The atmosphere is great, especially in summer and its a reasonable place to work, very close to Carnegie Mellon.