The Irish Bar is Just off the Stradun (main Street), it sells Guiness and Kilkenny as well as local beers, has a decent juke box and all the football etc on skysports, it also has various beer cocktails which are interesting!!! happyhour is 3 till 6 everyday,just ask anyone in the old town and they will be able to tell you where it is, there is a big Irish presence in Dubrovnik at the moment so I'm sure you'll bump into some people who have already been to the Irish bar!- the best night spot at present is latino club feurgo, there is loads of livley bars to drink in up the side streets of the old town.