A lot ! I drink IPA's mostly, so when I drink anything with less flavor, that shyt goes down like water.
Most I ever did had to be somewhere around 30-40. Visiting my boy in SD a few years back, started drinking at his house with his roommates. Then went to a bar he manages in PB, drank on his tab, and picked up another case with his roomates on the way back. When my boy got in from work, he told me I drank 23 heinekens on his tab.

(This was at a time i was not messing with hard liquor)
Edit:

@ the thread title change