[_delirium]

Late 20s is not "getting older" by any stretch of the imagination. In the West, it's (though this varies by social circle and class) roughly where you start to count as an adult, perhaps akin to what 19-20 would've been in a previous era.

The social aspect also depends on a lot of things, like coworkers and living arrangements. Some people aged 30 have almost exactly college-style lifestyles: live in a group house, party daily, go into the office at 10 or 11am. I think one reason the view that it's hard to meet people post-college became common is that those kinds of lifestyles were not really seen, outside of some hippies and beatniks, until recently.