The top floor of the building, formerly the Four Seas's third-floor 500-seat banquet room, was still under renovation at Mister Jiu's debut. Almost three years later, on March 2, 2019, owners Brandon Jew and Anna Lee, both also of the restaurant, established the place at the top floor as Moongate Lounge, a sister bar and lounge upstairs from the main restaurant. Moongate Lounge occupies one half of the building, i.e. 5,000-ft2 space, including high ceiling; Mister Jiu's occupies the other half.
