So well said by Diane B.
Truly.. there is no one size fits all answer to "normal."
For the purpose of data collecting only... in our house (neither myself nor my spouse come from families that abused or had dysfunctional relationships with alcohol).
We are both 46 years old. He has 1-3 beers in the evenings after work/before/during dinner a few nights a week. Not every day/night. He enjoys beer when watching football, or listening to music. But he also enjoys exercise, and won't drink if he is planning to work out (running, biking, total gym, lifting weights, etc). He will enjoy a glass of wine now and again, but not his first choice, usually. He hardly ever drinks liquor.
For me, I enjoy wine, but not frequently at home. I tend to only drink A glass, possibly 2, and I have a difficult time bringing myself to open a bottle knowing in advance that half will end up wasted/poured out. So normally, I only drink wine at home when we have guests who will also enjoy a glass with me. When we go out for dinner, I will often have a glass of wine with dinner. Husband will often have a beer, maybe 2, with dinner at restaurants.
I couldn't tell you the last time he drank more than 3 beers in a day. Most days he works he doesn't drink at all.
Our children are not legal to drink alcohol. Son is 16. Daughter is 13. They participate in Holy Communion at church services. Small sip of wine, not grape juice. Son was allowed a half glass of champagne on New Year's Eve, at home, with us.
When I was younger, I partied like a "typical" 20 - something of the time. Vodka/cranberry (3 or 4 in an evening) and a shot here or there (Jagermeister, Goldschlager, Cuervo, etc), or drank ice cold bottled beer (usually on hot afternoon or outdoor occasions). Margaritas were a "mexican restaurant" indulgence.
I drink when I want to and don't have any expectation of driving or exercise in the immediate future. I rarely, if ever, drink when I am the only adult home. Although, now that son is a legal driver, I may (over time) begin to feel more relaxed about needing to always be on my game and ready at the drop of a hat to be a responsible adult and take someone to the hospital, or pick up someone stranded by car trouble. :)
As far as getting trashed... I honestly cannot guess at how long ago I've done that. Probably somewhere around 1994/1995.