For all of you backpackers and student travelers on the go that insist on lugging around your wifi ready laptop, Jiwire.com will be a useful tool for you.
Navigating your way on their site is a breeze and doesn’t really need any explanation. Country, State, City, done.
Here’s a snapshot of a search I did in a nano-second. USA, Cali, Brentwood.
As you can see, it will show you the exact establishment that is offering wifi and if you have to pay for it or can use and abuse it for free!