One great pub was already mentioned here. I like Sir William’s much more. I may drink literally anything I want, because I can decide among more than 70 different beers from Ireland, England, Germany, Belgium, Slovenia and other countries. Not to mention 30 different wine and whiskey brands. For me it is also more peaceful environment, to think and talk with my friends.
Their specialty is the monthly organized beer tasting. It is an extraordinary occasion in which I once participated. I paid 20 euro and tasted from 7-10 different beers, just like a real enologist. I recommend you trying Belgian brewed beer called La Chouffe. It is delicious.