Last week at ITEXPO in Los Angeles there was the standard Free Public WiFi option which you see virtually anywhere there are other wireless devices. I know not to click on this network now but I am sure I was fooled by it some time ago.
Basically the network is created by a "virus" and is being propagated by Windows XP machines. It does not appear to be malicious but clicking on it will not get you on the Internet so don't bother and save yourself time, energy and aggravation.
Here are the details - someone asked me about this network at the show and I told them not to click on it. I couldn't recall why - so I hope the person is a reader and this answers their question.