Note, I have recently became an organizer of this group and I am changing things from how they have been. The formerly LibertyMingle is no longer about Libertarianism, but about liberty. So, you do not have to be a Libertarian to be a member of this group. (In fact, I am not a Libertarian myself.) Also, all official affiliations with clubs presenting themselves as "Libertarian" are no longer in effect.
This group is about discussion about the meaning of the concept "liberty" and "freedom" in politics. Its name derives from the name of ancient Greek's political unit of "Polis". This was the time when many thinkers expressed their ideas about what should be a good political system.
As a member of this group you get to meet other thinkers concerning the perfect political environment, and have dialogue.