I did this for a week in Paris (late 2019, there was a strike and the metro had like 2 functional lines). In the afternoon of Christmas Eve got a yen to go to Montmarte, grabbed a scooter near Etoile and in short order got to experience the C.E. mass at Sacré-Cœur. The enhanced mobility is amazing, and its a great way to explore various alleys and neighborhoods. Frankly I was pleasantly surprised at how the Paris drivers coexisted with us on scooters. I felt perfectly safe.
iirc, there is a lane for buses and bikes, which is mainly what I used. But then there are the circles and intersections, and narrower streets naturally only have so much space.
