I studied at Trinity College for a month back in the summer of 1993 (I think), and made the requisite trip to St James’ Gate. There’s a tour there that only cost about 2-3 pounds. At the end, they allow you to drink two half-pints of Guinness for free. If I’m not mistaken, getting a pint of Guinness for 3 pounds back then was pretty good. Find a way to bypass the tour, and you’ve got yourself a great bar.