Jack and Aku drinking sake and talking on a table (or stand up) at the "Three Balls Chandelier Hall" (right at the bottom of the stairs on the second floor). There are two samurai swords inside a window on the wall (on the right wall).
Obi-Wan Kenobi (Jedi costume from from Episode 3), Darth Vader, Yoda and Chewbacca hanging/chilling, talking, smiling and eating a "barque" of japanese food on the mat section, while there's a scene of Star Wars rolling on the TV hanged on the wall. (Any scene you pick from any SW episode).