Despite the fact that there was a sleep cycle on the ship, there was no real time when everyone was asleep. The ship may have run on auto pilot, but there were certain screens that needed to be monitored and tasks that needed to be done, so someone was always awake. Tonight, one of those someones was Mary.
Not because she was monitoring any screens, but because she found that she could not sleep. She had tried reading for a while, but found reading on the PADD to be difficult. It wasn't the same as a paper book, though those were hard to find on board the ship. She decided to take a walk in order to hopefully clear her mind and get herself to sleep.
Mary debated getting completely dressed again, but in the end just decided to throw a satin robe over her nightgown. It was probably improper, but most people here didn't care and she couldn't be bothered. She didn't expect to run into many people anyway.
She wandered aimlessly down a ew of the halls, seeing where her feet would take her when she came upon a man that she didn't recognize. He must be a traveller, since he wasn't wearing the Starfleet uniform. Mary nodded at him slightly. "Good evening."