This is Race to Dinner. A white woman volunteers to host a dinner in her home for seven other white women – often strangers, perhaps acquaintances. (Each dinner costs $2,500, which can be covered by a generous host or divided among guests.) A frank discussion is led by co-founders Regina Jackson, who is black, and Saira Rao, who identifies as Indian American. They started Race to Dinner to challenge liberal white women to accept their racism, however subconscious. “If you did this in a conference room, they’d leave,” Rao says. “But wealthy white women have been taught never to leave...