"We'll supply the food, music and party balloons, plus three free drink tickets per person."
Staff were told to bring cash if they wanted to turn the celebration of making budget into a bigger night.
The first email said the company proposed scrapping its digital media area and having all parts of the business carry the responsibility for developing the area.
There could also be a new commercial area and a new product development business, it said.
The changes could also see a cut in "labour costs by combining and reducing a number of leadership roles".
The Herald has approached TVNZ for comment.
The proposals come as media companies seek new audiences.
Radio NZ chief executive Paul Thompson recently announced 14 jobs going among its staff of 280 people but a greater investment in video and youth-targeted platforms. The National Business Review has likewise broken non-traditional ground by launching its own radio broadcasts.
The broadcaster currently employs about 750 people.
A TVNZ spokeswoman said it had "entered into consultation with business leaders in relation to a proposed reorganisation".
She said the new structure coming out of the consultation would be announced in early August.
"This is about responding to the rapidly changing media market and aligning resources towards shaping TVNZ's future - particularly in the digital space."