February is hot cohocolate festival month at City Bakery on 18th St just west of 5th Ave. The link below will lead you to a calendar showing the special flavor for each day--ginger, stout, and Earl grey tea, among others. There are descriptions of the flavors. I like the straightforwardness with which they describe their caramel hot chocolate as "a little too sweet."
They are also having an essay contest. Topic: Should hot chocolate be drunk with or without a marshmallow? Why or why not? Grand prize: free hot chocolate for a year. Info also at link below.