WHY ARE WE/THEY IN THE LOUNGE
Page two and no mention that these are (mainly) air-side lounges. So, why are folk in them? My guess is that they are waiting to fly in an aircraft. Admittedly, some may be in them to visit a meeting room. These are not social clubs, footy clubs or RSL's - most of which have stringent dress standards for social reasons.
In either case, those folk in the lounges, either domestic or international, should be appropriately attired. That means long trousers etc. and decent footwear. Dress standards for safety reasons.
Guess I'm one of those old farts with standards.