Organizations after undergrad that are like fraternities in terms of brotherhood?

[MU2Driver]

Originally Posted by UnfortunateGDI

I checked it out and tbh it gave me hope. I can't find too much stuff on google about grad students rushing a fraternity and getting bids so the thread is more of an exception and in a good way too. So far from what I have looked into, it seems like most of the bigger fraternities at state schools like say a Florida St for example only give bids to undergrads and prefer freshmen because they know they can get more money out of them (they will pay for 4 years).

You live in SD (lucky!!!!), any ideas of how things are like at UCSD or San Diego St?

I think this and several of your other comments reveal a fundamental misconception about GLOs. They do not exist primarily for you or anyone else simply to take what you need from them, be it "brotherhood", other relationships, business contacts, social status, etc. They have existed for 150+ years because they provide a symbiotic and highly valued relationship between the group and the individual.
I think I can speak for most people here on GC when I say we joined because we wanted to be part of something larger than ourselves, and in that process of joining and contributing over time we gained more than we put in, which is why we continue to be actively involved today.
GLOs don't focus on recruiting freshmen to make more money. Especially on the IFC side, where quotas are not a factor, it would be in a fraternity chapter's best financial interest to take as many new members as they could get -- regardless of freshman/upperclassman/graduate student status, collect the initiation fees, and immediately kick them to the curb. The fact that none do that proves the point. They focus on freshmen because that is the logical path to start the development process, transitioning from high school, that results in the kind of lifelong members we want.
Until you wrap your mind around this concept of giving instead of taking, I sincerely hope you abandon this idea of pursuing GLO membership. Neither you nor the group you would join would be happy with the outcome.