My group of friends and I rent a bus for our yearly trip. Sometimes with driver, sometimes without when one of has the licence. Where we less, we would rent or borrow a mini-bus. And I'm regularly borrowing and renting vans and cars for trips for just a few.
Personal car ownership can be greatly reduce while still improving personal transportation convenience. Of course, at some point, it might become slightly less convenience for the individual passanger but the benefit for society would still compensate it.
It part of the protesting movement against the megabassine in what protesters call now the "water war". The objective of this particular protest was to block the port of the city of La Rochelle which is considered by protester to enable the owner of the megabassine to do the business that require such a big use of water. The mouvement has its own french wikipédia article . You can use a translator to learn more about it there.