this is a relevant read - http://www.nytimes.com/2012/07/15/fashion/the-challenge-of-making-friends-as-an-adult.html?_r=1&adxnnl=1&pagewanted=all&adxnnlx=136298

this is a relevant read - http://www.nytimes.com/2012/07/15/fashion/the-challenge-of-making-friends-as-an-adult.html?_r=1&adxnnl=1&pagewanted=all&adxnnlx=1362981828-IFeaWGqBlRzRM6qmewLA6g http://www.nytimes.com/2012/07/15/fashion/the-challenge-of-m... it seems that the types of interactions you're referring to require repeated, unplanned interactions, and an environment that encourages people to let their guard down.