An early morning coffee with a friend who thinks that meeting at 7 o'clock is letting things slip. This triggers flashbacks:
I knew an executive who, due to his strange travel schedule, used to have 4 a.m. staff meetings. [I'm sure his associates loved those.]
Another memory: Teaching a harassment prevention workshop for a night crew at 2 a.m. Judging by their questions, a lot was happening durng those hours. Even the name - the night crew - had certain connotations. Most of them were in their twenties. Hmm.