I can’t think why no-one has instituted this yet.
You get two bar code tattoos on your forearm – one is for a pint of your favourite beer, and one is your BSB banking details.
Then, instead of standing an a confused gaggle of punters at the local pub trying to get the bar tender’s attention, waving $ 50 notes, and making entitled noises, you merely roll up your sleeve and slide your arm out on the bar.
The bar tender scans it and when a green light goes on over the appropriate beer tap indicating that the order has been received and the money debited from your account, draws the pint and places it in your hand. No language barrier and startling efficiency. If they do this well all night you roll up the other sleeve and expose a bar code that will provide them with a tip.
You cannot leave home without your beer code bar codes!
Who says technology can never be beneficial?