When you get a job where you sell alcohol, at least here in Louisiana, you need to get what’s called a “Responsible Vendor’s Card” which is also referred to as a “bar card.” For around $25.00, you can take a bullshit “class” where some schmuck will give you a few facts about alcohol, its effects on a human, and what can happen to you if you server someone “too much.” As with many other permits and licenses, this is just another scheme to generate money. If you don’t believe me, just take one of these “classes”. The instructor will give you the answers. If he doesn’t, you can just copy off someone who knows the answers. They’re only there for the money. They don’t care if you get someone drunk.
In real life, it’s damn near impossible to be a “responsible vendor.” When you have a table ringing up a tab that goes into the multi-hundreds, the last thing you want to do is cut them off while likely insulting them. This could prove detrimental to your tip.
Personally, when I notice someone has had “one-too-many”, I start dropping subtle hints. I start offering water or jokingly say, “You’re not driving, right?” All the while, I’m hoping this patron will know when to say when. There are many different ways servers handle drunk customers.
When a customer is getting drunk at a restaurant, it’s very uncomfortable for the server.