These are all wonderful places to have a cup of hot chocolate.
You can tell the area I spend the most time in is Chelsea and Flatiron.
Cafe Sarabarsky on the upper east side has a lovely atmosphere,
and is in a terrific museum, the Neue Galerie.
Boucheron Bakery on the west side has a nice view of Central Park.
These days are terribly cold so hot chocolate is extra fortifying.