I know a dude who is a big time lush, goes about 160, fifty years old. He can drink a case in his sleep, remember our beer is more potent. According to his doctor his liver is in great shape.
He's lean and he's been doing it for years, he's a pro. He's the kind of drunk that can slurr and mumble for hours on end and not pass out.
I also worked with a dude who could drink eight beers at lunchtime(I was with him at the bar) and finish the shift. Again, very lean(175 lbs) and very hyper active. We called him shake and bake cause you never seen him stand with both feet on the ground at the same time lol.
Personally, if I string a few weekends together I can build my tolerance up at the same bodyweight. If I go a few weekends without, I pay the price the next day large lol. Huge hangover and it takes less beer to do the damage.
It takes all kinds no matter what the science tells you. Hard liquor gives me blackouts, especially Sambuca. I don't know what it is about that shit that fucks me up so bad lol.