The Frightened Brides(1954)
(Book 20 in the Saturnin Dax mystery thriller series)
A novel by Marten Cumberland
Lovely Sophie de Landeve thought up the bright idea and the party. All five of the girls in the 43 Club had been recently engaged, and now all were married. So they met in sophie's beautiful Paris home for mutual admiration and mutual confidences, each newly-wed to take her hair down, whilst a good time would be had by all.
Used availability for Marten Cumberland's The Frightened Brides