The Drinking

You're quite ignorant. George and Martha are serious drunks, and alcoholism is a PROGRESSIVE disease. The amount they consume over the course of a long evening is easily sustained by such drinkers. As for Honey, she CLAIMS she's "not much of a drinker", but anyone reading between the lines can see she "loves brandy, I really do." As for Nick, he technically drinks the least of the four (Martha the most). The drinking is realistically played out.

I thought the same.

The one unrealistic thing about the play is that with all the drinks that went down, nobody was running to the bathroom to pee!

But yeah, George and Martha appear to be hardcore alcoholics, the kind who've built up enough of a tolerance that they have to slam down ten drinks to get as hammered as they used to get on two. But they lived in a time and place where alcoholism was both socially acceptable and affordable, so their evenings at home could consist of getting shitfaced and screaming at each other, and their social life could consist of getting shitfaced and screaming at their friends, neighbors, and colleagues... and nobody in New Carthage thought it was weird! Heavy drinking was common and popular at the time, and I bet that wasn't the only marriage in that town where both partners thought it was easier to wait for the other's liver to fail than to get a divorce.

They drunk enough to be in a comma!

Well

George is obviously what they call a Functional Alcoholic
Martha we find out, beyond having nothing else to do beyond being the daughter of the president of the college --- drinks to forget the son they lost

The other 2 were just following their hosts lead