I was there this evening and my laptop (Win 7) connects straight away.
A few weeks ago one person's laptop - running Vista - decided it wasn't going to connect to the internet. It connects to the router but no further, the messages "Unidentified network" and "Local access only" are typical on the statues icon. The same laptop connects fine to the owner's BT Home Hub when he's at home. I'm pretty certain that he will not have done anything that has screwed it. Clearly the laptop is connecting to the router but won't go any further.
I've tried all sorts of things, e.g. deleted the network and reselected it; IPCONFIG shows only the basic MAC address data; /RENEW or /RELEASE has no effect; used Windows Repair.
As it's working fine at his home I clearly am reluctant to do too much, e.g. roll back network card driver and see if there's a new one, he's only at the club an hour or so a week so it's not a critical problem, but it is irritating.
I won't be there for a couple of weeks so I won't be able to try anything for a while.
We have more and more laws, and less and less enforcement