I will attempt to explain this very simply --- and then I will go away and let you rip me to shreds.
1. If you believe your membership in your GLO is for a lifetime and more valuable to you than your membership in a health club, I think it belongs on your resume. In my case, I only included the high level offices I held as a collegian, along with other extra curricular involvement e.g., Student Government and Class Officer.
2. I have only applied for jobs in the South and Midwest, so I was never afraid that it would be viewed negatively.
3. It truly stuns me that posters/moderators on a GreekChat site care enough to be on here everyday and comment on hundreds of threads, but choose not to include their membership on a resume.
But, of course, I agree -- if I'd only served as T-shirt Chair, I wouldn't list that either.