That's the problem with us using Skype - you have to know one of us on Skype to get added to the conference. It's a different person hosting the calls every night, so you never know who to call. That was the nice thing about using the voicebridge, having no central command and anyone could just call in without getting the approval of regulars first. Skype used to have chat rooms which would be awesome for us, but they closed those down a few years ago.
We've been talking about giving Google Hangouts a try. No idea if that works like a room that anyone can join or not.