Yes I think so, because we are exchanging knowledge even by writting, reading, listening and speaking; also a great way is using the mic to communicate and gain information that way. In case you want to practice, let me know your email and I`ll meet you there;)
I think it's a good way to improve your fluency but what if you are using a wrong language ( idioms, grammar errors etc.) if nobody corrects you will go on to do the same mistake and it will became more difficult to correct these mistakes. Because of this it' s not enough to chat with a regular friend.