We had a suprise 80th birthday for my grandmother at Trattoria Fresco in West Caldwell. It also happens to be one of our favorite restaurants in the area. Their food is AMAZING and they did a great job with the party!
Also, Nero's in Livingston is a great restaurant for a party. They have a lot of different rooms that can be rented out. The food is American so there are a lot of options! We've also had surprise parties there and they have also done a great job!