There is also the question of filtering and logging. There are legalities around running public Internet that would need to be considered and if offering free Internet for young people there may need to be a nod to any duty to protect them, at the least it may need an AUP that people sign up to on connection.
It may be possible to set up access points on the businesses own network connections and use a VPN to a management service that manages filtering, logging, etc - I don't know if any exist as haven't done it this way before but I suspect there may be some out there.
Also, if using a businesses own connection then there may need to be some sort of throttling installed - the business may be using it for their card payments and it wouldn't be good if someone downloading or uploading a large file killed the bandwidth to the extent that payments couldn't be taken.
There was a company in Chichester (not far away from Petworth) that was going to provide public WiFi to the whole town centre, they had funding and had done various designs and got agreements to install on various buildings. But, ultimately it fell through - not sure why or what happened but it isn't a simple thing to set up. Can see an article from 2014 here
EDIT : Another article here
with another pair looking to provide WiFi to parts of Chichester in 2017 - might be worth seeing if they would be willing to discuss it - I am not sure it ever happened...
Edited by ian72 (Tue 19-Nov-19 10:42:02)