Formed by David Sterling to aid montgomery in North Africa in WWII, the SAS was a team of five officers and sixty men who were all drawn from the commando units. They were put through gruelling training. Early failures were overlooked in the light of successful tactics and destructive capability shown later in the war.
When one member was captured, he escaped, and walked 200 miles in eight days of blistering desert heat with no more than a map, compass and a pair of shorts to rejoin his comrades.
Lifestyle that involves freely travelling to major cities of the world and always going for the most expensive accomodation. Synonymous with Haute couture, aristocracy etc.
Those who bash the jet set lifestyle will 99.9% of the time not be able to afford it. The other 1 in 1000 people who discriminate against it are usually former jet setters too old for travelling much, have a fear of flying (but there's always boats) or simply live in a cave.