"Eat and grocery shop..."
...so you can go home and eat some more. Seriously, if Chinatown had a "restaurant district," I would say Mott St. is it. Check out Harmony Palace (Mott and Canal) for a good place to bring out of town friends. Since its been renovated, it's seriously kind of swank/tacky. It'll impress people who are afraid of the grittiness (and Healthy Department doubts) of most Chinatown restaurants. Across the street, there's another place that's become more the local hangout since Harmony Palace upped their prices due to renovation. The restaurants down these two blocks are local favorites of mine.