At first, the journeys were entirely professional.
One person travelled to the same city regularly for meetings, a project, a client relationship or an industry commitment. The rhythm was familiar: arrive, check in, work, perhaps have dinner with colleagues, then leave again.
There was little reason to think of the city as a destination for anyone else.
The stay was usually too short. The schedule was too full. For those at home, the place was mostly a name in a calendar and a point on a flight board.
Then a longer stay created an opening.
There was a weekend before the first meeting, a free day after the last one, or simply enough room in the schedule for someone close to join for part of the journey.