If you're hungry in the middle of the night and can't find a place that is still open, go to Lucky House. I discovered this place a few weeks ago when a friend of mine took me there after a late meeting. We were both very very hungry, and she wanted Chinese food, I didn't know of any place that was still open at midnight, and then she suggested Lucky House.
We were one of the 2 customers there. This place was an Italian restaurant before, but now it's a Chiness restaurant. They open from 11am - 2am during the week, and they open till 3am on Friday, Saturday, and Sunday. What do they serve? Chinese food! The owner and the cooks were all from Hong Kong Royale in Richardson before they closed. So the food is just like Hong Kong Royale in Richardson. Now you can have dim sum in the middle of the night.
I really like their shrimp dumpling soup. Their dim sum is not bad, not great. They also have the traditional rice porridge dishes as well as noodle dishes.
Definitely worth a visit!