The area used for the banquet was all the parts of the city which were destroyed by the previous fight, by the time the guard of the city finished cleaning all the debris, the war was over so instead of starting the reconstruction Orson informed them in advance to calm down the masses.
All the merchants and owners of a store knew that after a victory, a great celebration must be upheld, so they proposed to prepare a series of attractions to help the atmosphere become festive.
Which resulted in the current scene where there were different stalls, from snack stalls like fried things, sweets and things like that, to games of skill and luck, there was a bit of everything.
While Kana dragged Sylas, Milia, Sarina, Alice and Aria with her to the attractions, Mylene was in charge of their security or at least that was her excuse to go and play with Kana, Eris on the other hand went with them but just to hand the list of the materials needed to modify the spirit formation to Sylas.