In lot's of bars they have what appears to agitators on the bar to place the can to get more air in it so it resembles the draft. ( I am assuming that's what it does.) It is better than straight from the can, but not as good as draft, and i assume fresh in Ireland.
"The Twins"- 2 Large Grill Domes
The "New" Twins- 2 Meadow Creek PR72G's
Weber Smokey Mountain