how about going early and check out all of them? Last year my flight from HKG to SIN was at 10am, showed up at 630 am and went to all 3...let's see.. there was UA, THAI, and SQ. NH doesnt have one.. it's joint with UA if I remember correctly. UA and THAI are in the same area. The SQ one is very nice and big and has better food than Thai.. But quite far away from the rest of them.. You can lounge hop all you want.. You don't have to stay in one..no such thing..