Do temporary prayer halls take on the ruling of mosques?

Question:
He says: We are here at the center, or in the camps, or in some halls where we sometimes pray. Are we required to perform the greeting of the mosque?

Answer:
The greeting of the mosque is for the mosque. Prayer halls do not have the ruling of mosques. Prayer halls that are set up in a circle or outside a circle, or during travel, are considered a musalla (prayer place) and are not called a mosque. They do not have the ruling of mosques because they were not established for this purpose; rather, they are incidental. If they pray in a room because it is suitable, or in a "seeb" (tent) or such things, it does not become a mosque.
However, if he prays the rawatib (the regular voluntary prayers attached to the obligatory ones)—the four rak'ahs before the midday prayer, which is a recommended practice—it is not called the greeting of the mosque; it is called the rawatib. Likewise, in the musalla prepared for people at the camp, which is not called a mosque but is a musalla. If they go out for a walk around the town and set up a musalla for themselves, it is not called a mosque. If it is called a mosque, that is a leniency in expression and a figure of speech.