As such, housing laws would make that illegal. And those same laws would make illegal banning 9 friends from coming to one’s residence for prayer while at the same time permitting those same 9 friends from coming to that same residence for playing board games, shmoozing and/or partying — IF they don’t pray together.
No, they wouldn’t. “No prayer” is a neutral rule, and a private organization has every right to make such a rule, unless there’s a state or local law that says otherwise.