I run a Warframe Group here on B.net. It's not really a clan, so you can still be a part of your war frame and/or destiny clan and you can join multiple groups at once. There are over 240 members in the group and we primarily use it for socializing about war frame, trading and recruiting. If you are reading this, I either already sent you an invite or you can message me for one. (Copy and paste is a life saver sorry haha)