How to use "milling" in a sentence

As Tina stood in this beautiful theater, glancing down at the colorfully costumed people milling about on the stage, then looking at Joel's rubbery face, listening as her co-producer unblushingly raved about their handiwork, she was happier than she had been in a long time

Tina pressed through the milling onlookers who filled the wide center aisle, and she located Michael almost at once