We have seamless WiFi throughout the office for devices provisioned/maintained by the company (laptops, work phones/tablets, etc - there's some kind of MDM/certificate scheme for these boxes). I can work anywhere (break room, conference room, someone else's cube, etc) on that network. Presumably, everything is logged but you are inside the firewall, can access our internal build servers/exchange/compute resources/etc - basically this works everywhere on any of our campuses transparently, when I go to Tokyo I'm on the same network as if I was in SF, just with more latency. I have once in a great while checked my personal gmail off this network, or sent someone a facebook IM - none of that seems to be blocked. But, normally I use my personal devices for that stuff rather than the work ones:
Separately there is "free" wifi with registration/sponsorship required, you can request an account by going to a webpage inside the firewall, giving an email address and instantly get a username/password good for up to 48hrs. You can use this account with your personal devices that you bring to work (phones/ipads/tablets/laptops/whatever) - I register them to my personal gmail address, and if you email the IT dept they will extend the account for a couple months. I expect everything is logged there too and there's probably filtering going on (haven't tested it much because no reason to do it), but on that Wifi network, you are sitting outside the firewall and just get generic internet access. I use this to do my personal email at lunch, check in on Clash of Clans when taking a coffee break, make dinner reservations, look up vacation info, etc.
We also use those guest logins for vendors/customers who are visiting the office for meetings/training so they can VPN back / check their email / download their powerpoint, which I think is the actual point of the system.