This article advises to remember faith-based communities when identifying target public.
Faith-based communities are large, active, and influential. They are well organized and have regular methods of communicating via websites, newsletters, direct mail, and face-to-face interactions. For example, if your restaurant is near a church, make sure your hours and staffing can accommodate parishioners before and after church services, and let the church leaders know you are happy to serve their members. If you are near a Jewish temple, you may want to offer some authentic Jewish and kosher food items.
The PR tip here is to remember faith-based communities when identifying target public for your PR efforts.