E-Jo can mean many things in Korean...Yi dynasty. Back in Joseon (Yi) dynasty, the main dishes served were side dishes, rice, and soup. E-Jo is known for their soup, so order their sullungtang, gomtang, dogani tang, haejang guk.
haejang guk - best for you party animals who have a hangover.
dogani tang is my favorite.. so order this.
btw.. you're stupid if you order anything other than their soup.
E-Jo also means "forget". So after you have your hangover soup, forget about all the bad decisions you made the night before. :)