Welcome to the forum.
was publicly outed for collecting the MAC addresses of any open WiFi
connection at the same time as they were photographing for "Street View" the open WiFi networks have very much dried up. There are still some out there, but far fewer than before. On the other hand, pay-for providers like Beacon (http://www.beaconwifi.com/)have
been expanding their range and my be found in some larger anchorages
. Also, some cities, like Miami
Beach (WiFi @ City of Miami Beach
) offer free WiFi that you can connect to from most of the anchorages around there.
Anchorages that we've found WiFi at in the past, have gone dead this year. So, all in all it's a moving target. I could not guarantee that, by the time you get to any anchorage I might suggest, that the WiFi would still be there. When you get to an anchorage you might just boot up the computer and give it a cruise
through to see what's there. Sometimes you get lucky, sometime not.