To be honest, i don't exactly know what this room/area is. As a part of the abandoned convention center and hotel, Graha Garuda Tiara, i think this space here is for a semi-indoor activity, perhaps a gym or else. This place has been abandoned for about 20 years, and during that time, a lot of damage happened. You can actually see in this pano that a few structure beam is being cut by scavenger to be sold later, causing the floor plate to collapse. Everything here is just look like they are ready to go down.