New Year’s Eve is usually celebrated in Europe with fireworks by the main town center, whichever one that might be in Rome. I myself am heading to Athens next week last minute and wondering if I’m gonna find a place to go for dinner this late. I would just go for a nice early dinner and then search online where a lot of the outdoor stuff is happening.in Europe, New Year’s Eve is a bit different and most European cities people at midnight leave where they are at and go out into the streets to shoot off fireworks or watch fireworks and wish everyone nearby. Happy new year. I would assume Rome ticks that way too.
I would search the web and see if they do fireworks near the Colosseum as a backdrop that would be really cool to see