Every major school district in the U.S. allows churches to rent their facilities. The only one that bans religious groups is New York City.
Legislative bodies routinely open their meetings with an invocation. At the Capitol, it’s common for legislators to invite ministers from back home to do so for the House and Senate chambers. But what happens if the pastor mentions “Jesus” more than once or twice during the prayer? What happens if he or she thanks God for the resurrection or asks for forgiveness of sins? In some parts of the country, at least, those prayers could be banned.