Greek Affiliations on your CV?

[SoEnchanting]

Hey guys I am in need of advice, and I am hoping someone on here knows the answer. I am preparing my curriculum vitae, and am wondering if it is appropriate to include your Greek Membership. I am in the medical field, and so it is academically/medically-geared. All of the templates I've seen for this kind of thing include a spot for "Professional Affiliations" for your academic extracurricular activities or professional greek organizations, but I don't know if LTO necessarily falls into that category since it is a social sorority.

So... Leave it out? Keep it in? I am hoping there's a former lit or business major or someone who can help me! Thanks!