Dun Laoghaire - Gilbert & Wrights (?) not sure it has any Irish craft on tap, you'd be better off walking from there to the Purty rather than going back on the DART if you did pick it.
Sandymount - the village is a bit of a shlep to any pubs, even if they do have Irish craft.
Sydney Parade - is the M1 still closed, does it or did it ever have Irish craft?
Grand Canal Dock - do none of the pubs around Beggars Bush/Haddington Road have Irish craft?
Pearse - Gingerman or Probus - I know it's only bottles in the latter and the former will bring up the civil war (FW).
Tara - Mulligans (pere) of Poolbeg St or Messrs Maguire - though obviously would you be bothered getting back on the DART to go 1 stop to Brew Dock?