Myself and the wife went to Dublin for a gig last year and found it so expensive we'd never go back!
We arrived on Saturday morning, flew back home on Sunday afternoon and in the meantime had spent just on £200.
This was basically, bus fares from airport to hotel and then from hotel into city centre, 2 breakfasts each, sandwhiches and drinks.
A pint worked out at almost £6, £8 for a Southern Comfort and Lemonade (a half bottle of Southern Comfort only cost 9 euros in an off licence), although prices got slightly cheaper the further outside the city centre we got.
We had a great time but at those prices, we won't go back.