PT.Kartika Buana Ayu was a building management for one of venue provider in South Jakarta. known as Balai Kartini. The Balai Kartini – Exhibition and Convention Center spans around 45.673,71 sqm and comprises a round theater-style hall, exhibition halls, a spacious main lobby VIP rooms and lounges, and 6 further meeting rooms which can be configured to match specific event requirements. also own food and beverage services to caters event held in.