One Dangerous Lady by Jane Stanton Hitchcock
First line: "It is a truth universally acknowledged that a widow in possession of a good fortune must be in want of a husband."
"I admire you...You have principles. Fortunately, I gave mine up for Lent in 1975."
"Money's the only thing that really talks in this town."
"I understand. And I wish it would shut up for once."
And a particularly over-the-top decorating style is described as "Rococo-a-gogo."
Jo at least tries to contribute her time to valuable enterprises, like her beloved Municipal Museum. She's been through a lot but still makes every effort to be classy, socially correct, and loyal to her friends. Those friends are well-drawn, too, and they're sources of both support and exasperation to Jo. There's Betty, who tells it like it is and wears whatever she pleases even if it's an orange dress with a green collar that makes her look like a carrot, and June, who can't stand not to be invited to things and sees herself as a grande dame, even if no-one else does. And on the non-friend front, Carla Cole is a consummate villainess - charming and cool on the surface, ruthless and rather crazy inside.