Sandip Gohil
SerpAPI
This was right below our hotel (Hotel Lirico) by the Teatro Dell'Opera which we visited everyday in the mornings before setting off. I paid €3 for an Americano, Cappuccino and a Cornetto/croissant! Whether it was an error or not, it was a cheap place to get a morning coffee and sit down before hitting the rest of the city. Not touristy at all and the younger Roma fan who serves was very friendly. Tasty and expertly made coffee, great pastries and they have an extensive breakfast menu.
They also do gelato and beers and cocktails but we were not in the area for later in the nights so never got to try them.
Also there's a photo of Francesco Totti in there with the owner, what's not to love?!
Definitely visit if you want something that the locals want.