Use the post below this one, "Making the Boring Bearable" to expand on this prompt about a person at a convention.
I ran from room to room, trying desperately to find the "Understanding Leadership" class before it started. Behind every wrong door, I found more people like me: frazzled, frustrated, and bored out of our minds. Finally, I found the right room, opened the door, and groaned. The lights were that faltering fluorescent kind that always gave me a headache...and this was scheduled to be a three-hour-long class!