It seems like a lot of beer to consume, but in America, beer is generally weaker in taste and alcohol content. By Czech standards, it's safer to say that Kerouac had probably drunk only 20 beers or so. As for wrapping himself around the bar toilet, the standards are probably the same in both countries.
Czech beer is good, no doubt about it.
My first taste went down in a pub, a village pub, the kind with high ceilings, lots of windows and not a breath of fresh air inside. The bartender was busy pouring beer into one glass after another, but only in spurts because the foam was taking so long to settle. Finally the waitress arrived and presented me with a glass of wheat-colored beer topped off with an incredibly thick head of foam. I was a little unnerved about having to tip my glass and head so far back just to get at the beer. It would be more than a little embarrassing to fall back onto the floor without a drop of alcohol in my blood.