As pointed out by others it depends , a normal Saturday night would be 7-8 pints , same on a Friday unless i am working on Saturday morning then its 4-5 . The last all dayer i went on worked out at 18 pints , these days are rare maybe once a year .
Back in the days before all day opening a good mate used to drink 10 pints of Guiness at dinner time then 15 at the night session every weekend