"Sometimes my flatmate is at her boyfriend's house and I am away for three nights a week so there are times neither of us is at home."
Santoss would have never considered sharing in Brazil but said room-share was an easy way to form friendships.
"For people away from their family it is also a nice way to have people around all the time."
Liane said the Rugby World Cup pushed up prices as fans snapped up apartments that students would have occupied.
"It will be interesting to see if people go back to having their own rooms after the World Cup but I don't think so. It is a good way to save money."
But not everyone is comfortable sharing with a stranger.
On one accommodation site, Dunedin students looking for an inner-city apartment in Auckland for the summer found the room-share too much.
"Probably more than half of the ads are looking for someone to share a bedroom," writes one. "Why do people all want to share bedrooms? Weird."