Meetup.com seems to be filling the niche and becoming pretty mainstream. I've used it on two continents now. There are a lot of tech groups, which I assume was

Meetup.com seems to be filling the niche and becoming pretty mainstream. I've used it on two continents now. There are a lot of tech groups, which I assume was their initial market, but I've mostly used it for language exchange. My other friends have also been using it for general hobbies.