a term used for burger king restaurants since 1955, used by many people because of the restaurants that served alcohol it was soon classified as a lounge in the late 50s. the term is not copyrighted by BK. Burger King never adapted this name because of their intentions to keep the restaurant as a fast food joint.
Person 1 : Hello James how about we go grab a brew at BK Lounge and wash it down with a burger and milkshake.
Person 2 : Well John id love too but wherever did you think of such a catchy name for Burger King.
Person 1 : Funny story actually i heard it from some guys down in Winchester last week when i was visiting my aunt Sue
Person 2: Well dang wabbit i sure hope this catches on it sounds so much better than Burger King.