an autobiographic musical which is described as "not very noticeable" on the first website you'll find on yahoo france at the following keyword "yves montand" (by the'end of the text)

Since "POUR LE 26" can only be translated "for the 26th, the obvious meaning of PLACES is seats. Someone wants three seats for a restaurant on the 26th.

Regards,
Bertha Deffenbaugh

That must be it:


Three Seats for the 26th
Capsule by Jonathan Rosenbaum
From the Chicago Reader

Trois places pour le 26 (France, 1988), Jacques Demy. For viewers like me who harbor passionately fond memories of Jacques Demy's 1967 tribute to the American musical, The Young Girls of Rochefort, Demy's 1988 musical (his last film) is clearly worth seeing, even if the recommendation has to come with reservations. While Michel Legrand's score for The Young Girls of Rochefort is one of the greatest for any musical, his comparably jazzy and airy work for the this one is only a pale reflection of his best. Similarly, the references to touchstones such as Silk Stockings, Singin' in the Rain, and The Band Wagon are all too fleeting, in striking contrast to the full-scale tributes in the earlier film to West Side Story, An American in
Paris, and Gentlemen Prefer Blondes. The difference between the two is partly a matter of scale and budget, and partly that the more recent film centers on Yves Montand, an eminence grise who looks more and more like Milton Berle. Playing himself, Montand arrives in Marseilles to launch an autobiographical musical revue that he plans to take on a world tour. He spends his spare time looking for an old lover, a onetime prostitute now a baroness (Francoise Fabian), whose husband is in jail for theft and whose 22-year-old daughter (Mathilda May), who knows nothing of her mother's past, has a burning desire to make it in show biz. Unbeknownst to the baroness, the daughter--a gamine clearly meant to suggest Cyd Charisse and Leslie Caron--assumes the female lead in Montand's show when the original actress drops out at the last minute (apparently taking her lead from Busby Berkeley musicals). This being a Demy movie, people are blissfully unaware of what's happening right under their noses, which in this case includes even incest. In short, all the Demy hallmarks are present--his silly but charming plot symmetries and coincidences, his lushly colored wallpaper, and his innate capacity to make real locations look like
artificial sets --though at times he's going through the motions rather than enabling his poetic conceits to fully take flight.