One of the popular tags on CafeSpot is FREEWIFI

CafeSpot is a social guide to independent cafes, coffee shops, restaurants, etc. The website is set up as a developing community that will increase awareness of independent places worldwide and provide for more accurate reviews. Being a social guide, the site allows you to both contribute and to explore the preferences and recommendations of other people.

(Thank you Will!)

It is possible to browse places by user chosen tags, proximity to other places, geographical area, or even just the latest additions.