Sergey ,i told you!i live in Tehran,and our time zone is pretty close,in Moscow time ,about 10-11 PM people start to go to the place which Lena also referred to.
You should open General Chat - which 'everyone' is talking - (and not New Chat) then if the users decide to do voice/video chat,they will send the link!
I think users actually do it almost everyday,more better at weekends.
IMO it will be great,if you also introduce yourself in General chat,and get to know users a little bit.but it's all up to you!