Where to work for free in Nantes?

Coworker Malin lists 4 free places to work from in Nantes: 4 cafes. 4 expect you to order something. Among them, 3 with wifi.

Can I stay and work for several hours in Nantes?
It depends on the place. Out of the 4 whose laptop policy is known, 2 welcome laptops and 2 would rather you didn't stay long. Each page spells out the house rules.