I like to have a few energy bars on hand, tucked away in my desk drawer or the glove box in my car, in case hunger hits unexpectedly. They tend to be about 200 calories, so they make a perfect snack and are much better for you than candy bars, but I don't eat them regularly.
If I am running after work and have no late afternoon snack, I will crack open an energy bar. I'd say I eat two a month. I have a friend who munches them almost daily to power her before-breakfast workouts. What about you?