The dance is being organized by an Australian volunteer organization—he doesn’t know or care about the details. Mrs. McTeague evidently feels that the rent she collects from her boarders obligates her to find them wives as well as feeding and housing them, so she badgers all of them to go, and to bring dates if possible. Rod finally shuts her up by announcing that he will be attending with a large group, to include his country cousin Mary. Rod is about eight feet tall, and so it will be easy to pick him out across a crowded dance floor. With any luck, then, the diminutive Mary will be in his vicinity.