From the QF website:
These guidelines are intended to create an environment everyone can enjoy, so please be mindful of your choice of clothing and footwear when visiting Qantas Clubs and Business Lounges in Adelaide, Brisbane, Canberra, Melbourne, Perth and Sydney.
In keeping with this, we ask you wear smart casual clothing and
shoes when entering one of our lounges in Australia or overseas.
If the "bloke" wants to ponce about in his faux fashion outfit that's his business. But why bother with publishing guidelines if you aren't going to ensure "guests" comply?