From BarCampGR

Free Wifi near Calvin College

View all locations on Google Maps: Free Wifi near Calvin College (can't seem to embed it here.)
PLEASE contribute by adding locations! Here's how to make a new location show up on that map:
  1. Find the location you want to add on Google Maps.
  2. Click "Edit" on the popup bubble for that location.
  3. Click "Edit details".
  4. Under "Type of place", click "Add another type".
  5. Enter "Free Wifi"
  6. Click "Preview..."
  7. Click "Save"

Within a few minutes your edit should cause your location to show up on the Google Maps search for "Free Wifi near Calvin College"!