If I remember correctly he started with 5 and Kazuo took two, in which he gave one to Bride andhe kept the other one while Dai took another so that leaves two in the bag being kicked around the fight
I think we can just start wandering around it for a bit until their back to normal, but we go through it fully once we when have our persona's i think?
My idea for Saito's dungeon is a mix of Among the Sleep and Yumu Nikki which mean some of the floors will be mundane like rooms from his house while others will be more surreal and horror-ish