What can I do to stand out at a job fair?
If the recruiter has 12 other people waiting in line, you dont want to talk too much. Also, if you sense the conversation is not going well, get out of there.
If its going well, take cues from interviewer. Feel free to keep chatting if there is nobody behind you. Recognize that the person you're talking to could have spoken to 200 people already, so be sensitive of the other person's time.