I've seen that a number of companies have these nice websites. We've just been using a private facebook group but many people are understandably reticent about using/joining it. I'm feeling inspired to set up a separate site for us.

I'm looking for something free where individuals can register and preferably post. I've found enjin and guildwork so far. Also considering starting from scratch on something like Google sites.
Does anyone have any comments on these or suggestions for other hosting services?