[Tagging] religion=multi* ?

[althio althio]

Jgpacker asks on the PoW talk page:
>> Are [Airports prayer rooms] really tagged with amenity=place_of_worship?
>> I would say it's quite a different place from a normal religious place,
>> and should get another tag.

I think they are definitively for worshiping and prayers.
amenity=place_of_worship is pretty clear for me.

Being different from the regular religious place, not consecrated, no
significant architecture, they are not
building=church/mosque/temple/*.
Indoor mapping might tell you room=chapel or room=prayer_room instead.
Besides amenity=place_of_worship.