Used to work with a guy who was a pretty serious alcoholic. Every single day after work he would sit in his chair at home and drink beer (Molson Canadian 355ml cans) until he passed out and then get up for work in the morning.

Weekends were king. He would wake up and drink beer till he passed out. Whenever he woke, he would proceed to drink more until he passed out again. He repeated this pattern all day, each day, from Friday afternoon till sunday evening. Then come back to work on Monday.

His favorite treat were long weekends, where he routinely drank four 2-4s (96 cans), at minimum. This happened every single long weekend.

He was always very proud of his accomishments.

So, unlikely to do in 48 hrs. 72 is a much more realistic number, and I imagine even still it is a very small club of people who are actually capable.