When i was on a pub crawl in Staveley saturday 2 October i asked in two pubs for a half of Guinness as the pubs did'nt have any real ale on but was told i could only have a pint of Guinness.
In the second pub the friendly barmaid explained that "You get a can of Guinness out of the fridge that is undrinkable pour it into a pint glass put it on a metal device and a machine type thing sends electrical waves through the Guinness which makes it drinkable" i have been in thousands of pubs and never seen this before.
Has any one else seen this devise and do they have a proper explanation about it.