I've been extolling the virtues of having a lounge at airports a long time - in the OZB spirit, I don't mean high end or first class lounges, just any sort of cheap lounge you can get your hands on, be it through priority pass, credit cards, dragonpass etc.
Skip overpriced airport food? Check
Free alcohol? Check
Unlimited coffee? Check
Shower? Check (most places)
In a Jam and need to make phone calls/send emails/last minute bookings? Check
Avoid dirty tables, uncleared bags, slow as hell service, and rubbish bins that are full to the brim and never cleared at HJ at Melb airport? DOUBLE CHECK!
However there are airports in which lounges are unnecessary : Singapore, HK, Hamad in Qatar, Dubai (depends). In fact I'd say in Singapore and HK, the public areas are nicer than the lounges, more to do and vibrant, large variety of local food and drink.
Obviously not been to the Sydney Virgin lounge :p