I think bars for the most part have to rely on their patrons' use of the buddy system for getting people home. How the staff deals with the very hammered patron probably depends on their behavior. If they are belligerent, they are probably tossed out and no one follows up to see how they are getting home. If they're out of it but not a troublemaker, they probably check and make sure they leave with their friends. If alone, they will probably call them a cab. Sometimes they will tell smokers "you can go out for a smoke, but no getting back in after 1:30". Zach left before the time when they lock the doors. I'm guessing he didn't realize they did that. Not all bars in Boston do. His cousins probably just had to wait at the coat check which caused the delay. Just a chain of events that had it not been so brutally cold would have probably had a completely different outcome. What happened to him at the bar probably happens every night of the year there, it's not usually extreme temperatures like that. Horrible accident, and agree that it was preventable if the bar decided to change their closing policy for one or two nights due to weather.