What happens between Nick and Jordan Baker in chapter 9 of "The Great Gatsby"?

Nick and Jordan meet for the last time in Chapter 9. It is clear that Jordan has not changed since Gatsby's death and she makes a joke about Nick's comment a bad driver is safe until she meets another bad driver.By that time Nick has already decided that Tom and Daisy are "careless people" and "left other people to clean up the mess that they had made." Jordan's comment indicates that she, too, is still part of the lifestyle to which Tom and Daisy belong. Nick is now 30 years old and says that that age is too old to still be playing games and "call it honor". He decides that her lifestyle, and that of Tom and Daisy, is not what he wants and he soon leave to go back home to the Midwest.