I'm a developer at twoo.com. we are the best, haha.
On a more serious note, we're quite big and not just dating, more like social discovery. If you want to meet up with people near you, for whichever reason, give it a try.
And as a shameless self-advertisement hook: we became the biggest dating site in just 18 months, worldwide that is. Now we're kind of trying to move on towards social discovery, meaning that you should be able to use twoo to find people with shared interests, like running.
also, let this be an open invitation to ask me questions or give us suggestions about the whole dating site thing 