I have often wondered about Wyckoff van der Hoef, the only fare paying passenger who boarded the Titanic in Belfast.
As a First Class passenger, he must have had the ship's public rooms virtually to himself during the trip to Southampton. Thomas Andrews and a few of the Harland & Wolff "Guarantee Group" were also in First Class but I suspect they were busy planning ahead most of the time. Therefore, Van der Hoeff was probably quite lonely.
As to the previous post, he probably stayed at one of the upmarket hotels near the Southampton docks during the layover there.