man/woman/gentleman/lady of leisure
Someone who has enough money that they do not need to work for a living, and therefore can spend their time however they please. The group mostly consists of ladies of leisure who use their time, money, and influence to help charity causes. I tried my hand at a variety of professions, but in the end, the life that suits me best is that of a man of leisure.
a lady of leisure
A lady of leisure is a woman who does not have to work. There'll be no more mid-week shopping now you're no longer a lady of leisure.
lady (or man or gentleman) of leisure
a person who does not need to earn a living or whose time is free from obligations to others.