Article continues below advertisementWhen Members Only: Palm Beach premiered, viewers expected couture, country clubs, and high-society drama. What they didn't expect was Rosalyn Yellin emerging as the emotional center of the series, and quickly becoming one of its most talked-about and beloved figures.From the first episodes, Rosalyn stood out not for volume or theatrics, but for her steadiness. In a cast defined by clashing personalities and competing social ambitions, she brought something different to the screen: perspective.