Forget cash, cheques or credit cards, one cafe has a different way of charging its customers for a cup of coffee.Metro St. James, a French style cafe in Sydney, is running a unique and romantic promotion this month.Between the hours of 9 and 11am, the cafe is letting customers pay their bill by giving each other a kiss.'We’re bringing romance back! Take your partner to the cafe from 9-11am in June and surprise them with a kiss when you order your coffee.'We’re not accepting your money, just your kisses,' reads a post on Metro St James' Facebook page.While some may find this concept somewhat creepy, the French-themed shop, which opened its doors three months ago, has included a video featuring several couples earning their cups of coffee by way of their lips.'We'll watch you. It has to be a real kiss, I can see if it's a fake kiss,' the proprietor says in the video as he hands over the coffees.He adds that if they try to fake a kiss, he'll know because he's 'kind of a specialist.'More than one Facebook user on the social media site has asked whether customers could arrive alone and just make out with the staff, with one writing: 'Can you just turn up alone and kiss that cute waiter with the french accent instead?'.