Echoing this big time, temple bar is full of pubs where you can pay upwards of €7 for a pint
Some nicer ‘traditional’ pubs in the city centre for yer lovely Guinness would be Kehoe’s, Grogan’s, Toner’s (great beer garden), Doyle’s
For craft beer wankery, Against the Grain, P Mac’s, Black Sheep are all good
Whelan’s for yer pub playing indie tunes with a nightclub attached. Workman’s and Grand Social are also great late bar/clubs with an indie/alt bent