Grenoble is one of the dodgiest places I have ever stayed. I could tell you some stories!! I'll never go back (in case I'm recognised)There have been two threads relating to France trips last year.
I posted to take care with extra security. For some reason the posts disappeared. Make your own mind up.
For clarity my bike was stolen from a ‘secure’ fenced, gated and camera monitored hotel parking. In Grenoble. Good hotel too. Thieves cut out a section of security fencing.
My suggestion going forward, disclock plus a secure chain (fastened to another bike or post preferably) I have also had a tracker fitted. Though I feel a tracker is for after a theft…but insurance cant say not done everything.