Make the bar identify a DD (or not if you're in an area with taxis) or lose their liquor license (like with serving underage kids). Or have them confiscate keys

Make the bar identify a DD (or not if you're in an area with taxis) or lose their liquor license (like with serving underage kids). Or have them confiscate keys of people who drive into the parking lot and only give them back after a breathalyzer. It seems easy enough to do if we're serious about it.