A chain of socially-minded cafés: Café Joyeux employs people with intellectual disabilities, and that changes everything about the welcome. Free Wi-Fi, home-made food that changes every week, and several Paris locations to explore based on your neighborhood. The vibe is warm without being over the top. You go to work, but also because you want to support a meaningful project. A solid option for a few hours of work, as an alternative to standard chains. Definitely try it if you haven't yet.
Yes — Café Joyeux is a coffee shop in Paris listed on Deskover as a place to work with a decent WiFi and a design setting.
Yes, Café Joyeux has a decent WiFi.