I think what you're asking, Blondie, is if you can have internet access apart from a wi-fi setup at a Kingdom Hall?
As mentioned yeah. Your smartphone does. You can use your phone as a wi-fi hotspot so you can connect an iPad to it. That link you posted earlier is just a crappy app that has a list of open wifi locations. Not incredibly useful these days.
Yes, if a Kingdom hall had an internet connection setup, the router could be programmed to only allow access to certain websites.
I am not aware of any policies from the branch in regards to internet access at kingdom halls. I know that assembly halls and convention facilities do.