I don't know about this. St. Martin of Tours and others forbad women from the monastery premises, and it wasn't for sexist reasons. I've also read that familiarity through the workplace spawns affairs. And I know from personal experience that NFP's counsel of "platonic cuddling" during times abstinence is dangerous advice.
In the heart of Rome, the Franciscan Fraternity of Bethany has quietly opened the first convento misto, where men and women who take religious orders can choose to live under the same roof.
Unlike nuns and friars in traditional convents and monasteries, the Bethany brethren take meals together and hold joint prayer sessions every day.
They engage in discussions on the issues of the day and share the daily chores, such as tending the gardens that provide much of their fresh food.
Housed in a modern complex in the district of Giustiniana on the Via Cassia, the monks and nuns live in separate cells in the same wing, with the men on the top floor and the women on the floor below. The cells all have ensuite bathrooms.
Link.
