Do what I do - buy coffee in Greggs. This has two advantages. One, it's cheap and I'm in Scotland so they are on every corner. Two, there is no danger of someone asking me what flavour I want and getting punched in the trachea.
Seeing as any place I know of with free WiFi is populated by Hipster morons wearing "ironic" glasses, I'll happily pass on that "perk."
Biting the hand that feeds IT
