What social networks exist on the Chinese internet, that allow people to meet and discuss things on any topic, or ask questions, like on Quora. I am learning Chinese and would like to practice. Any useful resources pointed out besides this question and answer site and dating sites would be greatly appreciated.
Check out 知乎 - just type that into google along with any random Chinese word of your choice, to find a load of threads containing that word - it's a great way to practice reading.
百度知道 is also a Q&A website. You can find all sorts of information on there.
Quora -> 知乎 （share your stories that you just make up）
facebook -> 人人（almost died）
twitter -> 微博 （to be a VIP follower）
reddit -> 贴吧（not allow overseas）
youtube -> 优酷（You can even watch videos between ADs)