My iPad doesn’t get prompted to login at Panera Bread when I connect to their WIFI. I found the following work around:
After connecting to WiFi, open a browser and navigate to one of the following URLs.
http://www.msftconnecttest.com/redirect
or
http://neverssl.com/
These are urls that will never use SSL. That allows the Panera Bread WiFi to intercept the request and redirect to its authentication page. This allows you to get logged into the network. The problem with other urls is that if it supports SSL (HTTPS) the browser will remember it and when you connect in the future, even if you specify HTTP, the browser will use HTTPS.