Worst First Dates?

I had talked to this girl for a while on atlanta.partyline.com and we agreed to meet at a mutual friend’s party. She appeared to be into me for two hours while we talked, isolated from the rest of the party. I went to the restroom, got a new drink, chatted with some other people for a bit, but afterwards I couldn’t find her. I didn’t find out until the next morning through our mutual friend that she left with some dude she had met only minutes after me.