One of the nicest (for me) cold weather drinks is an Irish coffee, though I prefer Tia Maria to whiskey if possible, properly made with the cream "head" on top. You drink it quite hot, and get a cream moustache, then spoon the cream and sugar out of the bottom of the glass (this can be followed by an exploratory finger from glass to mouth if no one's looking).
A couple or three of them and you're as warm as toast and quite.....mellow.
