X Research source While there may be a caveat for the Wi-Fi-you may have to buy a drink or a snack or create a membership with the business-the "cost" for the Wi-Fi is usually minor enough that it's worth paying.Who Is On My Wifi is a free software published in the Network Monitoring list of programs, part of Network & Internet. The internet's role in daily life is hard to ignore, which is why many businesses and public buildings offer free Wi-Fi. Visit a chain restaurant, retailer, or hotel that offers free Wi-Fi.