[viraptor]

If you want to meet lots of new people and mostly techy/nerdy ones, go learn some partner dancing. You may be thinking it's not for introverts, or people without skills, but you'd be wrong. (I was both when I started) As long as you enjoy some danceable music, and live in a city, you can probably find a place to learn. You'll end up going to some evening events very shortly and talking to lots of random people in a friendly atmosphere. Close contact with people did change my introvert mind quite a bit as well.

[petsormeat]

+1 on social dancing. There are explicit rules about the interaction, which makes it less exhausting than freeform chat.