Yeah but unless you're just a person who never grows up, or you leave all household responsibilities to your partner, once you have a spouse, family, and a "real job" the parties are a lot fewer.
Sure, but at least that's a choice. When I was a kid and heard "enjoy it while it lasts" I imagined being an adult as being chained under some big rock called "responsibility". But it really isn't. If you're an adult, and you want to party, and you understand and accept the tradeoffs that is associated to, usually you can make it happen.