Neediness comes disguised in many forms. People can smell it on you, and it acts as a great repellant. Showing up needy for an interview is the kiss of death.
Instead: try helpfulness.
Instead: try showing up hungry.
Instead: try showing up with readiness to do what it takes.
These three things are much more uncommon, but instantly send the message that you are there for what you can offer, not because you are unable to find anything else.