Have only enough food to last 30-60 minutes. You don't want people shitfaced with expensive clothes around them eating food. Have food ready for the die hards the will come early to shoot the shit with you. Those with lives or that are too cool for school are SOL with food. Chances are they would have eaten already anyway. Fuck it, just order a bunch of boxes of McD chicken nuggets. You would be considered a god.