Ladies who lunch

One of the first Chinese words (see above) that I learned was 'tai tai' or '太太'. It is a nickname for a privileged lady does not have the burden of working. She can spend her days socializing and shopping, etc. There is not a single word describing these ladies in English, but something came up to mind. They could be called 'the ladies who lunch' like in the song below. It is from Stephen Sondheim's musical Company.