

I have a feeling OP’s “friends” wont necessarily even be aware hes connected the device to their network. It sounds to me like he wants something he can hide places to take advantage of unsecured or public networks without having to sit there with his laptop doing whatever shady shit he has planned.
Its been a long time since ive used it but last.fm might be better for discovering obscure genre types than spotify. Spotify wants to generalize and distill their recommendations as much as possible because they want to appeal to a broad audience but iirc last.fm uses user tags to classify the music so its more likely something is tagged with the obscure search terms you’re looking for.