How much people can drink is very different, here is a true story from some years back.
My dad was a cop, and in the summer-time he used to fill in for another cop who worked on a small island named Samsoe. One day ma dad pulled over the local beer-delivery truck and talked to the driver for a while, in the end my dad asked him how many beers he had been drinking that day....His answer was 78 beers, and that was at 2.30 pm.....Imagine what it would be at 5pm....