The Joker has a side job as a clown scenario.
I may not know a lot about batman lore but I had this random scenario idea that the 1st robin (Not in costume but I don't know his real name) was throwing a birthday party for a young second robin in training. Bruce heard a knock on the door and checks out the window to see the joker in a different colored suit. Bruce yells the older robin's name and the older robin comes to him and says "What is it Bruce?" and Bruce replies "Do you know who's at the front door?!" and older robin looks out the door and replies "Oh it's the clown!" and opens the door. Then the next scene is the party where both robins are having fun at the party and joker who is desperately trying not to mess up his clown act in front of Bruce in fear of upsetting Bruce and Bruce and his Butler (Who I can't exactly remember the name of but I think it's Albert but I'm probably wrong) just staring at the joker judgingly and the butler whispers to Bruce the older robin's name and Bruce just groans "Yes..."
