I'm not a well built man, I'm 171 cm and 70ish kg.
Over the course of a 15 hour session (mixture of drinking at home and in a pub) I had:
6 cans of Guinness.
5 pints of Beamish.
3 bottles of Guinness.
3 pints of Murphys Stout.
I was stocious and in bits the next day.