This is a problem I ran into while writing a piece set into a post-apocalyptic urban fantasy future.
For a short background: I proposed a world where a large Island-country had disaster struck and regular living has become too dangerous with new predatory creatures as well as environmental changes.
A few different groups have survived at this place, each with their own different solution to the problem.
My protagonist starts out at their home - a modified cathedral now bunker structure originally inhabited by a group labeled as "doomsday" bc they predicted the events around 150 years ago and decided to close off.
There is space for around 150 people (statistically enough to avoid the whole incest thing according to diff. science papers), access to indoor gardening for food etc, but no electricity or ways to go outside. The group displays certain cult like behavior and apart from that the regular chores of cleaning, cooking, washing and farming,
I struggle to give the society anything more recreational to do to fill out their time. There's no need of excessive crafting - not enough spare material combined with the fact that objects are used for a long time.
So how does one survive "bunker" living mentally or better: what can you do in this situation on a day to day basis to have a sense of purpose?