Why do the Brits drink their beer at room temperature?
Lucas refrigerators.
The question really should be why do Americans drink cold beer?
Most chiefs will tell you that if you have something that tastes like sh*t, serve it cold. It will work most of the time.
And why are many American beers marketed as "refreshing"? If I want a refreshing drink I have a lemonade!.
My favorite beer is a Dogfish Head 60 minute IPA in a Samuel Adams beer glass about 1 - 2 degrees below room temperature. Magic.
