Guest host Cynthia Nixon presents readings from two classic works about avarice and pretension among the rich and the upper crust. In Tom Wolfe’s 1980s novel “The Bonfire of the Vanities” bond traders are high on audacity, while in Edith Wharton’s “Xingu” a sly trick shows up a snooty book club. Danny Burstein reads the Wolfe, and Christina Pickles nails the Wharton.