The degree of "the quality of being [dateable]" that one possesses.

How attractive that person is to their desired sex.

i.e. How likely a third party would want to date that person.
> <Matthew> Sure she's hot, but her high dateability is questionable when you start to know of her outlandish obsessions.
> &
> <CharlesLivingston> Listing "computing" as your main interests on [Facebook] negatively affects your dateability!