Sorry for the late news. But the venue of the event will be at Orchard Central. (Fountain Area) The nearest MRT station is Somerset, so it will be more convenient than Ngee Ann City. The reason why the location up there isn't updated is because every time I enter Orchard Central's address, the system says that it is invalid, therefore I couldn't update it. So sorry if this screws up your schedule.
Note: It will start at 3pm and end at 4:30pm.