A Fine Pair

 Two dancers, who appear to be from the 1930s, pose on risers for the photographer, Mayor, whose name appears above on the photo.  There's a nice contrast between the dark petticoats and the dancers' legs.  No clues as to the identity of the dancers, the date or the occasion.  The original is for sale at Del Campe:

http://old-paper.delcampe.net/page/item/id,63326236,var,FRENCH-CANCAN,language,E.html