Obama was en route to a campaign speech in Boulder, home of University of Colorado buffaloes, when he interrupted dozens of customers having eggs and coffee.
Reporters heard Obama commenting on how good the food looked as he asked people about their lives.
One college student who was waiting for Obama to get to her table said, "I'm just so hungry."
Wait staff at the restaurant wore T-shirts that said "Eat In The Buff."
(Copyright 2012 The Associated Press. All rights reserved. )