Solo Travel To Rome: where to eat solo????

As I prepare for my 8th solo Trip Home to Italy I asked a colleague where would she recommend to eat, solo, in Rome
I think I shall try at least one of them next week when I am home in Italia!!!

Here are some restaurants for a solo dinner:

1 – “Le Finestre” in via Chiana 80, Tel.: 06-8551076, http://roma.2night.it/locali/cena/pizzeria/1946/le-finestre.html. This is an informal restaurant for every age that serves pizza, meat and salads. Outdoor space. The area is Trieste near Parioli (villa Borghese)

2 – Always in Trieste is “Napolitanos“, an Italian Steak House, there is another one in NYC, that also serves pasta and salads in viale Regina Margherita 72, Tel.: 06-8844684, http://www.oltreillimite.com/aziende.asp?id=180 
slightly dim, relaxing atmosphere inside and an outdoor space in spring/summer, casual, also for solo people who are in Rome for work

3 – In the historic centre in a side street off  piazza del Popolo there is “Gusto” which is restaurant, pizzeria, bar. There is always a lot going on, casual and mixed customers. http://www.gusto.it

Where do you suggest a solo traveler to eat in Rome???