Comment by Grumbledour

I had a similar idea a few years ago and tried to set it up, but failed at making it easy to connect to. I wanted the phone to prompt you like when connecting to wifi hotspots where you have to accept some T&Cs before you can connect to the internet, but to then just show you the local services instead of actually offering internet. Honestly, this can't be that difficult, but at the time, I could not get it to work reliably.