I go out alone, but i always go to spots where many people are playing, and i start talking to people who are around my age.
So now, when i decide to play and go to a spot where many people are playing, i usually find someone that i know, or i get to know new people. I met one player so often that we now added each other in facebook and exchanged numbers, we plan on going to a spot in the outskirts of the city that is more difficult to reach as soon as we both have the time to do it.
So making new friends and networking is now basically an aspect of the game for me. After having a variety of jobs i am now a headhunter, so there is a chance that i run into someone who has programming skills, which could result in a better job with higher income for that person and a few thousand euros for me :)