Unfortunately some people do this, but I'm 33 and have a very healthy balance of partying and being healthy and have since I was 16. I have a good group of friends that are similar.
Of course I should define partying for me. I drink once or twice a month and get a buzz, and about every 3-6 months I go out and get hammered. Once a year I experiment w rec drugs.
I love what i do and it has no ill effects.
My friends were a different story - 2-4x per month and Rec drugs monthly -
I quit because I could not control it, it was time to change -