Hi,
In this
thread there is a brief mention of the late night menu in a post by Vital Information. Scroll down to the very bottom of his comments.
I don't often eat late at night so my comments are not derived from personal experience. There are several restaurants in Chinatown who change menus around 10 PM until closing. The portions are smaller as well as the prices proportionately. It is a quasi dim sum experience allowing you an opportunity to try more items on the menu, which is what we all live here for!
Welcome to LTHforum!
Regards,