so did david blackwell when he moved here four years ago. >> when i arrived in london, i felt isolatedcame with a couple of friends from uni, but they lived on the other side of town. i found it very hard to meet people and actually develop a friendship, because people did live so far away, and working seven day weeks, nobody has any time. you are tired in the evenings. it's not an easy thing to do to build a social sphere here. >> so, together with others, blackwell has started a campaign called "talk to me." the idea is to get londoners to socialize more -- not just live side by side in silence. people are supposed to strike up a conversation with total strangers -- who'll possibly become friends. >> mind if i join you, man? >> blackwell has made around 20 friends this way. what he talks about depends on his conversation partner and the situation. here, for instance, they're discussing the importance of authenticity in art. blackwell also distributes the buttons that show the wearer is willing to meet new people and engage in conversation. but not everyone's sold on the concept. >> i

so did david blackwell when he moved here four years ago. >> when i arrived in london, i felt isolatedcame with a couple of friends from uni, but they lived on the other side of town. i found it very hard to meet people and actually develop a friendship, because people did live so far away, and working seven day weeks, nobody has any time. you are tired in the evenings. it's not an easy thing to do to build a social sphere here. >> so, together with others, blackwell has started a campaign called "talk to me." the idea is to get londoners to socialize more -- not just live side by side in silence. people are supposed to strike up a conversation with total strangers -- who'll possibly become friends. >> mind if i join you, man? >> blackwell has made around 20 friends this way. what he talks about depends on his conversation partner and the situation. here, for instance, they're discussing the importance of authenticity in art. blackwell also distributes the buttons that show the wearer is willing to meet new people and engage in conversation. but not everyone's sold on the concept. >> i