Belonging to fashionable society; worldly:her mondaine world...
It thematizes the relationship among the toilette, painting, and self-representation, and defines that relationship as a matter of mondaine values rather than as a matter of femininity.
The painting reconfigures the motifs and, true to mondaine ideals, pictures Pompadour through artful indirection and allusion as artist and artwork.
That was just achieved by the enthusiastic participants, the solid organisation and the mondaine ambiance of Biarritz.