I was just about to post the same thing... here is my otherwise irrelevant two cents:  I have been in many areas and functions where abaya is not an option, it is mandatory.  As a *white* woman, I wouldn't think twice about people staring at me, thats their problem, divert your gaze etc... perhaps you are bit nervous at first, but you will become increasingly comfortable and not be concerned at all you will be proud of yourself