meetup.com is pretty great. When I moved out, I made a point of introducing myself to everyone in my new neighborhood that I ran in to and have made a few new friends that way. I also reached out to old friends on facebook and started chatting - it took some time, but now i have some more gal groups that I do things with again - the ones i kinda kept at arms length when i didn't want them all to know too much about my home life!