In Paris, it's mandatory to wear gloves when riding a Coup (article R. 431-1-2 of the French traffic law). Police officers are empowered to fine you if you are driving without gloves approved for motorcycle use. On approved gloves, you should find the CE logo written on the inner label.
Unfortunately, due to risk of theft and hygiene concerns, Coup is not able to provide riders with gloves. However, you can easily buy your own gloves in a specialty motorcycle store or on the Internet.
In Berlin and Tübingen, it's not mandatory to wear gloves, however it is recommended to do so for your own safety.