I think there have been no suggestions b/c what you would require is a time machine to take you back to the 1960s. Rome is an int'l metropolitan center and you aren't going to find your combination of needs easily.

If you want an area that seems more "authentic" compared to the rest of city then opt for Trastevere.

If you want convenient location - head for the centro storico - anywhere between the Pantheon/Piazza Navona and the Forum - although that's not near a metro stop

If you local, inexpensive eateries - then the area East of Vatican is for you.