How to get free Wi-Fi at home without internet for free?

I'm curious, could you elaborate on the concept of getting free Wi-Fi at home without internet for free? Isn't Wi-Fi inherently a wireless internet connection? Are you referring to setting up a local network for device-to-device communication, or is there a workaround I'm not aware of that enables Wi-Fi access without an actual internet connection? I'd appreciate some clarification on this intriguing question.