Pubs in Dun Laoghaire
Formerly The Beer Keeper. Unsure about the beer selection.
Fitzgeralds of Sandycove
Another recommended suburban pub.
The second (of possibly many) Wetherspoon's (a British pub chain) in Dublin. Draft beers seem to be mostly British and International. Irish beers are all bottles (as of Feb 2015). Not worth a special effort but worth a visit if in the area.