I was in Rome for a while last year. For bars, it's all about Ma Che Siete Venuti A Fa. Next door is the excellent Bir & Fud, which specializes in Italian beers primarily and has terrific pizza (get the Napoli). The bottle shop I thought was best was Johnny's Off License, which is in a kind of obscure neighborhood north of the Vatican, but had by far better prices than Domus Birrae. Obvious advice, but go all Italian and Belgian.
I can tell you where to get great Pizza in Rome: Forno Pizzeria Forno Via San Nicola da Tolentino #53 (Off Piazza de Barbenini) Roma, Italia
Only one I know of -- Open Baladin (just google it). Great stuff on tap and a gazillion bottles of things you've never seen.
Check out Open Baladin and you wont be disappointed, its about 10 mins walk from Bir & Fud, across the river. http://www.tripadvisor.com/Restaurant_Review-g187791-d1971737-Reviews-Open_Baladin-Rome_Lazio.html
Bir & Fud was a huge letdown considering how highly people talk about it. The beer list when we were there was just OK, and the pizza was meh. Maybe it's better at night. Open Baladin, on the other hand, is awesome. Great vibe, cool decor, and excellent beer. And the bartender gave me a free pour of Xyauyu Fume after I tried the Barrel.
Ma Che Siete Venuti a Fà Best bar. Very small but awesome taps and bottles. Bir&Fud Great beer selection and great food. Open Baladin Roma Great bar Johnny’s Off License Awesome bottle shop! You could buy bottles and drink them in front of the store when I was there. Great selection of Italian microbrews and many Cantillon...
Brasserie 4:20 is supposed to have a good reputation for beer... http://www.impexbeer.com/index.php?option=com_content&view=article&id=60&Itemid=75&lang=en Caveat - I haven't actually been to it, so am not speaking from experience. But perhaps someone more knowledgeable will chime in....
Loved brasserie 420, been 3 times. Great beers, good food, and great staff! I highly recommend going there
Great recommendations, and I was also going to recommend Bir and Fud as well. I do have a friend living there so I will have to ask if he knows another place other then those from above.
Brasserie 420 is the pub/ restaurant of Revelation Cat brewery, they had a bunch of their beers on tap along with some guest taps. Great stuff!!!