3892 The absence of a Minyan for Mariv in your shul reflects weakness, beyond praying with no Minyan

The aspiration is that the synagogue should be open all day and all night so that everyone in the surrounding area knows that at any moment, they can step in, focus on prayer within the four cubits of prayer, and immerse themselves in a book. https://www.torahrecordings.com/rebbe/igroskodesh/012/002/3892