If you go to a bar, you can “open a tab” with your credit card. This means you’ll leave the credit card behind the bar for as long as you’re ordering drinks and you just pay once at the end. The bartender may ask you if you want to “keep the tab open” or if you want to “close it out”, which means you pay immediately and take your card back. Yes, leaving your credit card behind a bar is considered a safe practice and yes, people sometimes forget about their cards and leave without paying… Jonathan and Julia would have never met if it wasn’t for an open tab at the bar!