What are the most famous bar scenes from movies?

We are doing a skit for spirit week at our school and we are having the famous Cantina bar scene, and i thought that a good idea would be funny to have some famous bar scenes going on in the background. My friends and i were wondering what were some of the most famous bar scenes? Note on this: These scenes will be going on in the background and will be more visually recognizable, so basically what are the most visibly famous bar scenes in movies?