Upon receiving the invitation from Lord Hurst, Antoine had immediately made plans to attend the party. There was no way that he would miss this - it was the perfect chance to immerse himself in 'polite' society even more. Which, of course was his goal.
So, he'd made his plans known to his father - who seemed to be recovering, but who knew - and left for the party. Upon his arrival, he scanned the room for people that he already knew. He needed to do his best to have at least one suitable introduction made. Crossing his arms over his chest, he watched the people milling about. Right now, he'd let people come to him if anyone wanted to talk to him.