Bars, Cafes, Discos, Cinemas...
Rome is a huge city and it's full of pubs, discos and whatever you need to enjoy yourselves. It won't be easy to find and decide what to pick during a short vacation.
A very good place where to drink is an Irish pub is the Iris pub called "The Scholars' Lounge" near Piazza Venezia, in via del Plebiscito. It has a nice atmosphere, very crowded on weekends when they host live music concert and after 2.00 till half past three. There you can meet lots of english speaking people, mainly tourists, and few Italians as well. Beers cost 5.50 euros, a standard price in Rome.
You can also eat something there.