It was a Dark and Stormy...

I'm on holiday in New England, and have just been re-introduced to the great cocktail, the Dark and Stormy:

Fill a highball glass with ice
Add 1 shot Gosling's Black Seal Rum (No other rum allowed)
Fill with ginger beer (3-4 oz.s)

I understand this is a tropical drink, specifically Bermudan. But I always see it advertised in Boston bars in the winter. Possibly based on the name, possibly based on the New England taste for rum. But it is also a very warming drink, especially if the ginger beer is strong and spicy.

I find that a 4-pack of ginger beer is about sufficient for a fifth of rum. Try some tonight.