Ehhh, it depends.
For a lot of people, 30 is about when the club starts getting old, and if you're the type to be out on weekends, you either stop going every weekend, or you switch up the spots you hit. Less clubs and spots that turn into clubs at 9. More lounges, speakeasies, taphouses, and breweries.
But if you're still in the club at 30 hitting the spot the exact same way you did when you were in your early 20s, you gotta have a hard conversation with yourself at some point.
Now, a BETTER question is: if you're still doing the stereotypical turned up brunch past 30, is that a cry for help?