Oh, so you can pray privately in the other ordinance rooms too? Or is celestial the most common to pray in? Sorry i'm not LDS, (but i am curious), but i have very hard to grasp exactly how things work in the temple, maybe it's obvious for you but not for me, and i get so different answers depending on who i ask... i got the impression from dravins answer that the celstial room is where everybody prays? and that the other rooms were for stages in the rituals?