Yes. In the case of fraternities, the stereotype exists for a reason: they overwhelmingly attract people who were either jocks in high school, or wanted to be cool like the jocks.
In my university, the Greek system as a whole (with the exception of two frats) was loud, obnoxious and cliquish. In addition, the vast majority of them majored in easy topics where they could get good grades with minimum effort. In fact, most house parties were thrown on Thursday nights because a ton of Greeks were business majors and the business school didn't have classes on Fridays. Or maybe it's the other way around...
What happens to those types of people? I think we all know: most of them end up under-employed (Starbucks, etc.) or they become "full-time students" by pursuing MBAs, law degrees, and so on. And of course, the ones with connections end up as pointy-haired bosses, much to our disappointment.
Sure you could. 23 year olds who like to attend pokemon meetups. University chess club members. Small town attendees of quilting bees. Maker faire regulars.
They're self-associations largely based on personal interests, so it shouldn't be surprising that there are common personality traits within the groups. You miss out if you blanket-judge people based on them, of course, but that doesn't make them invalid.
That's in contrast to race, gender, etc. where the group is not self-selecting.
See, you're wrong though. I attended Pokemon meetups at school while also being a member of a fraternity. I got shit for is but I just didn't really care. I gave people shit for other "weird" stuff they did all the time.
You're also wrong in saying someone who likes Pokemon is a specific kind of person. I know tons of "jocks" who played WoW and Pokemon with they're down time. In other words, your fleeting interests do not, and should not, define who you are.
In my university, the Greek system as a whole (with the exception of two frats) was loud, obnoxious and cliquish. In addition, the vast majority of them majored in easy topics where they could get good grades with minimum effort. In fact, most house parties were thrown on Thursday nights because a ton of Greeks were business majors and the business school didn't have classes on Fridays. Or maybe it's the other way around...
What happens to those types of people? I think we all know: most of them end up under-employed (Starbucks, etc.) or they become "full-time students" by pursuing MBAs, law degrees, and so on. And of course, the ones with connections end up as pointy-haired bosses, much to our disappointment.