In between third and fourth dances
Without meaning to, Astoria had arrived horribly late for the gala. The dress she had originally picked out with Daphne had looked quite ghastly once she had gotten it home. Therefore, Astoria had, at the last minute, searched through her closet for a dress that would be elegant enough for the gala but not recent enough for anyone to remember it. Wearing dress robes twice was most certainly a faux pas.
Finally settling on a long, black gown that was hardly memorable, Astoria had rushed over to the gala as quickly as she could. It hardly mattered, really. The dances had already begun and nobody that mattered had bid on her. Well, Draco Malfoy had bid on her fourth dance which was beginning in just a few moments but Asoria really couldn't be bothered.
Instead, she tried to look for Blaise. He had been ambiguous in answering her question of whether he was taking her or not and she had never responded. Needless to say they had not arrived together and Astoria was surprisingly annoyed with the situation.