Hello everyone, I'd use of much appreciation for the words in bold meamings... thank you. (Brown, Tina, "The Diana Chronicles", 1st ed. Doubleday ed, NYC, 2007.)
"she appeared out and about town with a nonhorsey set of actors from London's jet set."
out and about town >> socialised by going to clubs and so-on
Originally Posted by robuca
non-horsey set of actors > people who are essentially urban, preferring not to have anything to do with the countryside
jet set > rich people who spend their time flying from one party to another.