...Or any network where it is not known whether it is hostile or not. I.e. any network that isn't known-non-hostile. Which is most networks, possibly up to and including your own home WiFi.
But if you want VPN service, why not simply setup your own server? They're cheap. There are hosting services that accept cryptocurrencies if you're into anonymity, and then you can be certain there are no logs (unless the hosting provider logs you, of course).
But if you want VPN service, why not simply setup your own server? They're cheap. There are hosting services that accept cryptocurrencies if you're into anonymity, and then you can be certain there are no logs (unless the hosting provider logs you, of course).