Kappa Theta's are in the neighborhood of 250 as well... Might be a little more though. We raised them slightly a little bit ago, can't recall the exact value (yea for being an alumni & not having to worry about chapter dues )
You are not an "alumni". "Alumni" is masculine plural. You are an "alumnus", masculine singular.
The feminine equivalents are "alumna" (singular) and "alumnae" (plural).
Anyone who can't keep that straight, male or female, can just refer to himself or herself as an "alum" and nobody will ever know that he or she doe not know the proper Latin ... yes, it's Latin, not Greek ... although it's clearly Greek to some people.