Joking about atheist church

A joke from a friend that came up in an email exchange in which we were discussing the meaning of Sunday Assembly Boston. She writes that she across it during the Bosnian War; she thinks it was told by a Sarajevan

Q: What's the difference between a Sarajevan Muslim, a Sarajevan Jew, and a Sarajevan Christian?  

A: A Sarajevan Muslim is someone who skips mosque, a Sarajevan Jew is someone who skips temple, and a Sarajevan Christian is someone who skips church.

The extension to our context is, of course:

Q. So just what exactly is Sunday Assembly? 

A. A place for atheists not to go on Sundays.

*

Historical lagniappe: About a certain king of the Caucasus, 10th-century Persian explorer and geographer Ibn Rustah writes:

He prayed on Fridays with the Muslims, on Saturdays with the Jews, and on Sundays with the Christians. 'Since each religion claims that it is the only true one and that the others are invalid', the king explained, 'I have decided to hedge my bets.'

Ha.