There is the hydroponic garden in T3 on the upper level where the corridor to the G gates goes off. It has chairs and tables, and fierce grow lights if you need to brighten your winter. It is often heavily populated with airline staff. There is also an adjacent yoga room.

The quiet room in the HK Admirals Club is right next to the childrens' play room which can make it a bit noisy! The refurbished G Club is quite nice.