Ventilen, or “friend to one” in Danish, is an organization that helps 15-to-25-year-olds get together twice a week with two or three volunteers. Together, the people in the group play games, make meals, go to the cinema, and build human connections.

Back in 1999, a support group called Bright Point was formed to fill the need of friends. But when people came together, no one talked. It was only after games were introduced as a catalyst that friendships started forming. Later, making meals and exercising was added successfully.

The pro...