This song uses a bar as a metaphor for the end of something that you don't want to end. This can be anything, high school, college, a stage in your live, even a relationship to some extent. But it says that without something ending, nothing can start and its time to move on to bigger and better things. Drunks like being in a bar and they don't want closing time to come, but it will eventually and they have to use that as an opportunity to move onto bigger and better things.
This song uses a bar as a metaphor for the end of something that you don't want to end. This can be anything, high school, college, a stage in your live, even a relationship to some extent. But it says that without something ending, nothing can start and its time to move on to bigger and better things. Drunks like being in a bar and they don't want closing time to come, but it will eventually and they have to use that as an opportunity to move onto bigger and better things.