Had a really strange experience with the BT Openzone wifi at the Basingstoke Hilton. Essentially saw the Openzone access point but refused steadfastly to connect, citing that it could not get an IP address from the AP.

After a good hour fruitlessly trying to connect, I gave up and went to bed. Woke up at 6am and tested it before heading to work and it worked instantly without complaint! I don't think there were any BT guys on site overnight to fix the problem. Weird!