I finally got to go to Max Brenner in New York. It is the outrageous chocolate restaurant I described previously, but had not yet tried. Here's their slogan:
I had crispy chocolate egg rolls, filled with hot melted chocolate, nuts and bananas, and served with two types of sauce: chocolate and salted caramel. Amazing.
One of my friends ordered the dark chocolate shot, shown below:
The cup on the left is over a flame. You add milk from the right, then chopped chocolate from the middle and stir it together. Luckily, the stirring spoon has a straw in it, so you can sip the warm drink.
I think this is how all hot chocolate should be served.