A room for prisoners to fulfill their Spirituality need.
The Spiritual Guidance program takes place here, and requires a Pew for every prisoner, and a maximum of 20 prisoners can attend the program. It runs for two hours. If you schedule a spiritual guidance session (in programs). A Spiritual Leader will arrive at your prison (during scheduled work hours) and will provide a calming status effect to your prisoners. The status effect can also pass on to other prisoners. The program time can be adjusted with micromanagement.
Note that even though pews take up 4 spaces, they also allow 4 prisoners to sit: thus the difference between a pray mat and a pew is negligible.
Added in Alpha 29