Among them will be Bryan Davies, the original hostel manager.
Mr Davies said that the hostel came about after the Dunstan High School board of trustees, then known as the board of governors, became interested in the concept.
The go-ahead for construction was later given by prime minister at the time Norman Kirk.
The hostel was ready for students by term 3 in 1975 and was officially opened by then prime minister Bill Rowling.
Being the first co-educational hostel in New Zealand, and the first which consisted of units and not dormitories, meant there was a lot of learning to do, Mr Davies said.
"There was nothing really to go by."
Mr Davies was in charge of discipline in the hostel, and during the day worked as a fulltime teacher.
His wife, Maureen, was the matron of the hostel and handled the running of the facility as well as the meals and staffing.
Mr and Mrs Davies worked for the hostel from its opening in 1975 until 1979.
Mr Davies continued as teacher and sports co-ordinator until 2002.
He said he was looking forward to the reunion and to have a look around the hostel, which had changed a lot over the years.
"It’s changed a bit ... they’ve got new buildings there we didn’t have and so on."
