"WiFi" access is usually limited to a personal router for the home, or at a business. Its not a term to used access for a large geographical area. If you're at home, and "seeing" a network name (Emily1), then its a personal router at one of your neighbors. If you are connecting to it, and they don't know about it, you shouldn't, as it most likely wasn't meant for you.
In order to access a WiFi network, again either a wireless router in your home connected to some internet provider, or at a hot spot at some business (e.g. a local coffee shop, or hotel), you usually need (3) pieces of information.
1. SSID - name of the network
2. Type of security used - WEP, WPA, WPA2 (if security is enabled)
3. Security Key - password or passphrase (again if security is enabled)
Even if you have all (3) pieces of info, if the router is using MAC address filtering, you need to be on the router's "list" in order to connect.
Hope that helped.
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