The quote humorously suggests that the establishment has been around for a very long time, implying it predates even the rise of modern fast-food chains like Burger King. It emphasizes the age and long-standing history of the place in a playful manner.
By referencing Burger King as a "prince," the quote also uses a metaphorical expression to highlight the significant passage of time since the venue first opened. It adds a nostalgic tone, making it clear that the location has been part of the community for many years.