Artists depiction of the court.
The Uber Court is where the Radioactive Uber Clan sits down to plot and make plans. It's a giant table with one seat for every RUC member. Popeye The Sailor was inspired by King Arthurs Court and decided to make one to gather all the members to talk about world problems and discuss plans on how to solve them.
This is also where the RUC does their yearly Radioactive diner court where they eat expensive or delicious food while discussing the problems they solved that year.