圣诞节去Chicago~请教

I'm planning on going to Chicago for the first week after X'mas and want some suggestions from you guys :)
So should I start reserving hotel now? And hotels in which area provide a good combination of goegraphic situation and money?


Is there any place that I can get good Chinese food and Korean food?


I know it's pretty cold in Chicago during the winter, but is there still any place worth going besides shopping and stuff like that?



Thanks a lot!