In the area near Piazza Bologna you will find a lot of nice restaurants that offers typical Italian menus. For example we suggest Mizzica, in via Catanzaro, a restaurant specialized in traditional Sicilian kitchen. Another nice place is Sahara restaurant, in viale Ippocrate, it offers Eritrean specialties. Anyway you will find a lot of different restaurants in the same area offering from pizza and Italian cousine to Japanese and Greek.
If you are better with pubs, bars and night club, you'll find what you look for. We suggest to try at Luppolo12, in via dei Marrucini, where you can find every day a different offer of craft beers, local and not. But in the area of San Lorenzo there's plenty of pubs and bars where you can drink for cheap and meet a lot of people, you have only to choose among them.
In the area there are also some cinemas, like the Tibur, in the centre of San Lorenzo.