Call the number on the card she left you and tell her how you feel about what she did.
"I'm calling to let you know that after our meeting today I felt sort of used. First you pretended to be interested in something that I doubt now that you have any true interest in, to start a conversation. Dishonest. Soon as you got my contact info, you launched into your real reason for talking to me. Third, it distracted me from enjoying the event, and fourth, you made no effort at all in discussing any useful topic or conversing with me further. It was as shallow as it could get."