Davos is primarily attended by middle-aged men. Attendance is by invitation only, according to CBS News. As a result, the conference has long faced criticism over a lack of diversity among attendees — for example, only 22% percent of Davos' 2019 attendees were women, the BBC reported. The average age of Davos' male attendees is 54.Not even everyone who is invited to the conference gets to attend the most high-profile panels and parties. The WEF uses a complicated caste system of coloured badges to determine who can access which parts of the conference, the BBC reported. The highest-profile attendees are given white badges with holograms, according to the BBC. Even the Belgian Prime Minister didn't get one of those badges at last year's event, photos show. The lowest-level badges are provided by the resort town's hotels and don't provide entrance to the conference center at all, Business Insider reported. They do get buyers into the after-parties and onto the ski slopes, however.With past themes like Resilient Dynamism and Globalization 4.0: Shaping a Global Architecture in the Age of the Fourth Industrial Revolution, even the topics of conversation at Davos can be hard to decipher. Complicating things further, the conference also has its own jargon. Attendees use phrases like material improbabilities, circularity, and resilience imperative in ways that can only be understood by other WEF members, reports BBC's Joe Miller. He called Davos jargon a crime against the English language. Much of the conference's most interesting and consequential discussions take place after hours and behind closed doors, Business Insider reported.The WEF waives the conference's 27,000 Swiss franc ($28,000) admission fee for all attendees who are not there to represent a business, Business Insider reported. However, all attendees do have to be WEF members. The annual membership fee starts at 60,000 Swiss francs ($62,000) and can run up to 600,000 Swiss francs ($620,000), depending on what type of membership you choose, according to the BBC. The costs don't end there, however. Hotels raise their prices to five times their normal rate during the conference, according to The New York Times. Rooms at two of the most popular hotels among attendees, the Belvedere and the InterContinental, are renting for $231 and $392 on nights in January, their websites show. Both hotels are currently sold out during the event.Various companies host a wide range of events for Davos attendees, The New York Times reported. One year, JPMorgan Chase rented out the Kirchner Museum Davos to throw a cocktail party co-hosted by Dimon and former British prime minister Tony Blair, according to The Times. Google throws a party each year at the InterContinental Hotel that The Times called the hottest ticket in town. In 2013, former Facebook president Sean Parker threw an infamous party where specially made stuffed animals illuminated dancers with lasers shot from their eyes as John Legend performed, according to CBS News. Also in 2013, Benioff flew in fresh flowers and a live band from his adopted home of Hawaii for Salesforce's party, according to The Times.Attending Davos is a lot like flying... without the actual flying, the BBC's Katie Hope wrote. Over 100 billionaires and 53 heads of state are slated to attend Davos this week, requiring tight security. Entry to the conference center requires passage through a security checkpoint comparable to what you find at an airport, according to the BBC. Davos turns into a veritable fortress during the event, according to The New York Times' Michael J. de la Merced and Russell Goldman. To make matters worse, the lines often extend outside into the snow, Hope reported.