The business-pitch room used by entrepreneurs on the British television show Dragons' Den is called the Den.
The name is built into the programme's title and describes the studio space where entrepreneurs present their businesses to the investors. A typical pitch includes an introduction, a request for a specific amount of money, and an offer of a percentage of the company. The Dragons then question the entrepreneur and may make competing offers.
The term is a branded part of the British format, not a generic name for every business-pitch television set. It is also why the British programme uses Dragons rather than the sharks used in the American adaptation Shark Tank.
The Den should not be confused with the programme's behind-the-scenes areas or with a formal boardroom. Although entrepreneurs discuss company strategy and valuations, the show consistently presents the central pitch location as a den, matching its title and imagery.