Drank in my 20's, not everyday or every week or...well, I didn't really think about how often I drank. But when I drank, I did it to get drunk.
The real drinking didn't begin until I was 30 or so. Every night until I passed out. At some point in my mid-30's things shifted around some and I became a binge drinker. Probably because of work, I knew I couldn't keep drinking like that every night and expect to be able to hold down a job.
Anyway, once the shift to binge drinking was complete I was still drinking roughly the same amount of booze weekly as I was when I was drinking daily, but it was compressed into a two or three day time period. The hangovers/withdrawals after those multi-day drinking sessions were gawd-awful, and would last right through my work week until I was finally starting to feel a little better by my next days off, whereupon I would again get my drink on. Very dark days, those were.