Florence - Irlanda in Festa
Florence celebrates Saint Patrick's Day with all things Irish - parties, concerts, games, special events, and Irish food and drink from March 17 through March 21 in Irlanda in Festa. Celtic music and dance performances are part of the Irish festival at SascHall Theater.
Irish Pub in Florence: Finnegan's Irish Pub claims to be the only Irish owned Irish pub in Florence. You'll probably find lots of Irish celebrating the 17th there.
Bologna - Irlanda in Festa
Bologna is a big university city with lots of nightlife and is a good place to celebrate Saint Patrick's Day. Bologna's Irish festival, Irlanda in Festa, lasts from March 17 through the weekend.
Irish Pub in Bologna: Celtic Druid Irish Pub is a good place to go for a Guiness. They hold a big party on March 17, be sure to wear green.
Forli - Saint Patrick's Week
The Emilia-Romagna town of Forli, near Ravenna, celebrates Saint Patrick for a week, March 12 through 19, with concerts, Irish dinners, traditional music sessions, and of course Irish drink. Here's the 2010 Saint Patrick's week program (in Italian).
Irish Pub in Forli: Wild Horse Pub, piazza Porta Ravaldino 5, is a good place to have an Irish drink and celebrate Saint Patrick.
Rome
Rome has a fair number of Irish ex-pats and you may find them celebrating in Irish pubs. but you're also likely to find them in one of Rome's Irish churches. A good Saint Patrick's Day activity might be to take a look at a few of the interesting churches. Here's an itinerary of Irish churches in Rome.
Irish Pubs in Rome: The Abbey Theater Irish Pub has live music with guiness and typical Irish dishes on March 16 and 17. The two Druids Irish Pubs have live Irish music and promise a Saint Patrick's Day party. Finnegan's Irish Pub says it's Rome's only Irish owned pub. Rome Explorer has a list of Irish pubs in Rome.
Verona
Irish Pub in Verona: Hartigan's Irish Pub and Birreria, Vicoletto Cieco Disciplina 2, is a small pub where you'll find Guiness and Irish music.

