This is all you need to know about the House of Nanking:
If you've never been, the owner will take your menus and just start serving you food. It's an experience I'll never forget! The food is plentiful and delicious!
Bonus: it's right around the corner from North Beach so you can drink off your meal at Tosca. One of my favourite San Francisco meals. Worth the wait!
How I researched SF: http://nearafar.com/2011/09/12/how-i-researched-san-francisco/