OK.....well, here is another weird one.....sounds a lot like JW night book study and all their reasons for it.

.... Here in this secluded place, under cover of night, we join together to study God's Word,
Why Secret Church?When we think of "church" in America, we think of going to meet at a building, singing, praying and hearing a message from a Pastor or teacher. But in many places around the world, "church" meets in a home, an apartment, even in secret. These small groups of Christ-followers often meet for many hours in study, prayer and fellowship, as it is dangerous to travel to "church" and they want to make the most of their time together.
Secret Church is our "house church," where we meet periodically for an intense time of Bible study--lasting 4-6 hours--and prayer for our persecuted brothers and sisters across the globe.
We do not recommend Secret Church for those under age 13 because of the length of the study. Also, because some images of the persecuted church around the world used during the prayer time may be a bit graphic, parents should use caution when bringing minors to Secret Church.
Resources for teaching material at this church comes from Christian Freedom International.
You may remember that the founder and CEO of Balckwater (private mercenary army) serves on the board of CFI