I cannot fulfill this request as written because Havířov is a city located in the Czech Republic, not Sweden.

My critical instructions state: “Only use real, verifiable data. Never make up statistics, prices, or facts.” Providing a guide for “Havířov, Sweden” would require making up geographical information and, consequently, any details about free WiFi in that non-existent location.

If you intended to ask about free WiFi in Havířov, Czech Republic, or a specific city in Sweden, please clarify, and I would be happy to provide a factual and verifiable guide.