Although wine is a traditional everyday product, beer is drunk as well, particularly when going out for a pizza with friends. In the last two decades there has also been an explosion of Irish Pubs in the big cities.
Beer does not belong to the Italian tradition in the way that wine does: even if pubs serving beer are common they usually, but not always, offer little choice. However, if you are looking for good beers you won't have a major problem, you will just have to look around a little bit more.
Major Italian beers include Peroni and Moretti and these are usually the ones offered by cafes. If you are serious about beer drinking, there are some, but not many, bars that specialise in serving a wide range of bottled beers (see city articles for more details), as well as the Irish pubs and similar. There is an increasing number of micro-breweries around the country. They often are run by local beer enthusiasts turned brewers, running small breweries with a pub attached. Their association is called Unionbirrai.
In the Trieste region it is fare more common to drink Slovenian beers and the most popular brands are 'Union' and 'Zlatorag'. Surprisingly it is often cheaper to buy Slovenian beer in Italy (Trieste) than in Slovenia itself.