As most airports are a reasonable distance from the centre of population, principally for safety & noise/pollution control reasons, from a convenience point of view, it seems unlikely that these could become centres for socialising and recreation.
Likewise, it is ingrained in society that socialising happens in each community's central communal areas which sort of rules out "socially displaced" locations like airports.
Being brutally honest with yourself, can you ever see yourself answering the question "So what are you doing this weekend?" with "thought I'd hang out at Heathrow. It's got a superb chilled atmosphere and there's always something interesting to do."
Transportation of large numbers of people and volumes of goods is the raison d'etre for airports, nothing else. By itself, travelling is inherently stressful, so the congregation of large numbers of stressed individuals is never going to promote a dolce vita ambience.
So overall, I can't see a great demand for parties at airports in the future.....