 What caught Natalie's attention at the Kudos Room and prompted the chat with Si?
They also had a banquet for him, complete with speeches by such bigwigs of the Department of Space Exploration as Academician Lofting Gubelin and Doctor Hans Girard-Perregaux. Even as Si listened to their speeches, accepted the watch and made a halting little talk of his own, he was grinning inwardly. Girard-Perregaux grunted his sarcasm and dialed a glass of iced tea and tequila. Girard-Perregaux was wagging his finger again, a gesture that, seemingly mild though it was, had an astonishing ability to break off the conversation of one who debated with the easy-seeming, quiet spoken man. Girard-Perregaux nodded his agreement.
 She noticed his space pin.
 The bartender introduced the two after serving them drinks at the same time.  She thought he was attractive enough and she was bored.  He had offered to buy her drinks all night.  She noticed his space pin.