What do your characters do to unwind? Where would they go to get away from it all? If your fictional world has a hierarchy (and frankly most will have something), are there places where the "commoners" can't go? How is that enforced?
I am about to head off to the Swanwick Writers' Summer School for a wonderful week of courses, catching up with writer friends, and making new ones. A marvellous time is had by all. For your longer stories, where would your characters go to catch up with friends and family they can't see often (and how did that situation happen)?
In my Goodreads blog, I talk about my holiday reading. What would your characters read? Does your fictional world have a good literacy rate? If not, is anything being done about it? I've mentioned in previous posts that a totalitarian world will seek to restrict/ban books (as sadly is seen too often in this world!) but is there an underground system that bypasses/overcomes those restrictions?
Plenty of story ideas there!