Used the PRICELINE link from here and tried bidding in Canadian dollars.
Started with $90 for City Centre
-increased to 95, added City Centre South
-increased to 100, added city centre north
-->all got declined, so just used the PRICELINE EXPRESS, *4, amenities included; business centre, restaurant, wifi, fitness centre - for $118/night Cad, total - $275. Retailed for $330, a bit of savings.
Please add to the hotel list for Dublin, 4* City Centre