Neil Armstrong was meant to be the first of many.
As a junior member of Auckland Observatory in the 1980s, I was pretty much convinced that in the world of the future (that's today) I'd be as likely to holiday on the moon as on the Coromandel Peninsula.
Blame Apollo 8. In December 1968, three astronauts orbiting the moon (not landing) sent back the first 'Earthrise' photos to the folks at home. For the first time, we saw ourselves and our planet as the aliens might see us. It's a helluva view.
That day, Pan Am announced they were taking reservations for commercial flights to the moon. The airline issued free 'First Moon Flights Club' cards to anyone keen to follow in Armstrong's footprint.
In the airline market of the day, Pan Am was something of a budget carrier, with a reputation for taking air travel to the masses, so if they said they could fly us to the moon it seemed plausible.