I wonder if they will rent the hall to other religious groups. Pentecostals perhaps?
Seriously, they would probably have 3 or 4 congregations meeting at one hall which would come out to 2-3 complete days vacant per hall per week as well as 6 partial days. They may even move the Sunday meetings to Saturday if any church group wanted to rent it on Sunday only. There's quite a few churches that meet in rented halls in my neighborhood - all of them Charismatic.