Bruce really doesn't want to approach you at the party, but he has a cover to maintain, but he knows that if he talks to you, the rumor will soon spread that he's seeing a Stark and that would be perfect for his reputation, he keeps his eyes on you till he sees you alone and takes the opportunity to walk up to you and strike up a conversation.

"What a surprise to see you in Gotham, Stark, what brought you here?" Bruce asks you, his demeanor relaxed on the outside but tense on the inside.