Dark brewed Beer is not served warm, it is served at cellar temperature which is 12 - 14c, not room temperature which is 20c, a good Beer or Ale served cold would ruin the taste, as beer is brewed warm so as not to kill the hops. larger or Pale Beer/Ale on the other hand is always cold, bud wiser and most American beers here are referred to as lager or pale ale, and always served cold. here endeth the lesson in English Beer/Ale, ps if you've ever tasted English Beer/Ale cold and then cellar temp: you would understand why.