Inflight bars bring a dash of old-world style into the modern era in which anybody can be a jet-setter.
Let's consider the bar on Emirates Airbus A380 – the first of the superjumbos to swap rows of seats for a social space which was more about creating a better travel experience than earning more bums-on-seats revenue.
Compare it to the fondly-remembered Captain Cook Lounge in the upstairs 'hump' of the first Qantas Boeing 747s.
Apart from the fashions and furnishings, it doesn't seem like much has changed!
Done right, it even gives the massive Airbus A380 an undeniably private jet vibe.
Emirates, Etihad and Qatar Airways all flying their flagship superjumbos out of Australia, and each takes a very different approach to its bars.
The nook at the tail-end of Emirates’ A380 upper deck has become a favourite haunt for many business travellers and frequent flyers.
That nook is getting a mod new look from later this year on all new A380s to join Emirates' fleet, with more sociable seating including cafe-style tables with a window view.
UAE neighbour Etihad Airways sees its A380 lobby, nestled between the business class and first class cabins, as offering the social qualities of a bar without looking like a bar.
Qatar Airways' curvaceous combo bar/lounge sits at the rear of the business class cabin on the A380's top deck, where passengers gravitate towards the long snaking sofas.
There are other airlines, too, among them Korean Air's Airbus A380 and Boeing 747-8, with a lounge and cocktail bar at the rear of the upper deck...
... and Virgin Atlantic's Upper Class bar, sadly no longer seen in Aussie skies...
... although you can sample the Brit airline's updated Boeing 787-9 bar between Hong Kong and London.
We know some readers love the idea of an inflight bar – a place to get away from your seat, a change of scenery during very long flights, chat with fellow high flyers.
In my own experience these make long flights seem much shorter, and provide a nice buffer between dinner, a movie and a snooze.
But as we've noted above, every airline's inflight bar is a markedly different affair: different in design, layout, space and the social interaction it provides.
So this week we're asking Australian Business Traveller readers: which airlines with inflight bars have you flown on, which is your favourite and why?