The classes are the following:

At Gymnase ORTOLAN, every Monday and Friday :
 from 17h30 | 19h : children classes
 from 19h | 20h30 : adults classes ( all levels )
 from 20h30 | 21h45 : adults classes ( all levels )

At Gymnase AMYOT, every Wednesday :
 from 18h30 | 20h : adults classes ( all levels )
 from 20h | 21h30 : "Hakama" classes (or dan exams training)

At Gymnase de L’ ASPTT, every Wednesday (242 rue de Bercy-75012):
 from 12h | 13h15 : weapons classes ( Bokken or Jo )

And soon, classes are likely to be given every Thursday, from 20h to 21h30 in the Vth arrondissement.