The tour in this photo has stopped in the courtyard of the Palais Royal. This particular tour was in French, but the same company also offers guided bike tours in English, as do several other companies in Paris.
(I've never taken this kind of tour, but I listened in on this one for a bit, and the guide seemed very friendly and knowledgeable.)
Second photo: The same group turning to leave.
Third photo: Tag on one of their bikes.
http://www.parisvelosympa.com/GB/index.html


