[Mz]

I am not on Four Square. Are they all about "stores"/other commercial spaces? Or do they do check-ins for libraries, parks, beaches, and/or other non-commercial sites?

(I am sparing you my probably crazed-sounding rant. :-/ But I find visions of a future where something like Four Square is all about commercial only spaces pretty horrifying. So I am hoping for good news about where they are now in that regard.)

[cinquemb]

No, you can checkin anywhere (assuming one can produce gps cords for the location).