Guinness is not a heavy beer. Not certain, but I think it lies around 6%. It is by far my favourite pint----if it has been treated and served properly.
   Our local club in the auld sod had a first-class pint of guinness; right temperature, regularly cleaned pipes, AND a good "club price"!
Then some blooterhead decided that in order to improve the BEER , an increase in the chill factor had to be introduced. So they chilled their lager [heartburn inducer] and stapled the damn' lager pipes alongside the guinness pipes. Utter ruin.The great pint of guinness chilled the taste-buds so effectively that it was hardly distinguishable from the yucky lager. And that holds good for ALL chilled guinness--no matter who drinks it, be it an Irishman in Dublin, or a Geordie in Newcastle. My first question in any bar is "Any REAL guinness?" Most barmen, to give credit, know exactly what I'm asking. They usually do have a "sacred " pump; long may it continue----