An excellent institution, which sometimes confuses European visitors. The acronym means "bring your own", i.e. alcohol when you dine at a restaurant.
Formerly almost ubiquitous, the practice is becoming less common - some say even dying out - no doubt to the pleasure of many Sydney restaurateurs.
It makes dining far more affordable than when you have to include the restaurant's alcohol mark-up, which is usually greater than on anything else you consume.
It also means you can occasionally splash out on a very nice bottle - of Hunter Valley Semillon, say - to accompany a spread of Sydney seafood without worrying about your starving bank account.
BYO is more common at medium range and casual restaurants.
Send your feedback or queries to been.there@guardian.co.uk
Search Been there