Careful using "Free WiFi"..............we ran a training day at work on Cyber security basically what the attendees thought was a 2 hour power point session that was boring from the first few minutes, this was done on purpose as we also set up an evil twin "Free open guest wifi" in the room nextdoor to the training room.
Using a wifi pinapple we ran a man in the middle attack on users approximately 10 minutes into the session.
after half an hour the power point was ceased & we gave the real lesson using some of the captured data & messages that had been intercepted & changed..........needless to say people think twice about using hotel or Mcdonalds & coffee shop free wifi.
Amazing how many people have their wifi connections on phones set to remember....our PEN test girly managed to pick loads up.
should always use a VPN on free wifi