Skype doesn't care where you set up your account. Talking via Skype to another Skype user is always free of charge. Only if you want to use Skype to call a regular land line phone number you will be charged. This feature is called Skype-Out and is an additional feature of Skype.

Of course there can be charges for using the internet of WiFi at a hotel or cafe but this has nothing to do with Skype.