Well at this point, after some pissy replies, I'm wondering if this thread should die. So far all I've really seen are a bunch of misunderstandings about existing chapters and possible future chapters.
I know that Gamma Phi Beta has an existing alumnae chapter, and that they definitely love their alumnae. I see girls who have graduated come back to visit, and girls who stay local sometimes come out to events. But their alumnae aren't a huge, overwhelming presence, just like ours aren't. I would say, however, that because of their alumnae chapter, their alumnae are a little more organized than ours. But hopefully with next year, we will have a more organized local alumnae base as well.
Gamma Phi Beta was installed at Florida Tech in 1981, and Alpha Phi was installed in 1990. (Sigma Kappa was also here from some time after 1981 to 1997, in case anyone was wondering.) Combine that with a very small female population until the last 6 years or so (and even then, it's 5:2 in the guys's favor), and you'll see that we couldn't possibly have the enormous alumnae base that large universities have. Total has been 40 since at least 1990, and like I mentioned, 2003 was the first time anyone has hit it.
However, I do know that Alpha Phi has some sweet older alumnae from FSU that live in Brevard county.

I'm not sure if there were any other chapters in Florida, but I know we have several alumnae chapters in Florida, just none within about an hour's drive of here.
ETA: I think that's where the snowbird thing ties in. There's a lot of alumnae chapters clustered near big cities such as Orlando or Tampa, but Melbourne and Brevard county simply isn't that big.