OK Jen asked me to help find alternate sites, so I'm here:)
I think it might be easier to post about one site per discussion...
To make it easier to find information:)
First Site: WildApricot
I used to have a Wild Apricot site, but left it for another site, which I then left for Ning:)
Now the reason I left it was because it was UGLY....
BUT since then I've learned a bit more about CSS, which is what it uses to customize it.
They do have several different plans, including FREE...
And you will notice they ALSO have a system for collecting membership dues:)***
They also have example sites listed on each of the following "tips & tricks" sections of the site: