In Holiday Inn, Jim goes back to New York to tell Ted about his idea of opening the inn. He says that he's been holding auditions everyday for a week, or something along those lines.
Later on, when Linda is there, he tells her he had prepared to sing "White Christmas" that night, Christmas night.
If he had still been holding auditions when he went to New York to tell Ted about the idea, on Christmas Eve, how could he have possibly thought the inn would be ready to open in time for Christmas the next day?
He had no performers, only Mamie and possibly a wait staff on hand.