Hey, Since I have been identifying as genderqueer, I sometimes go by neutral adjectives (i.e They) generally around the LGBT stuff I am involved in. Anyway something has occured to me, whets the gender neutral version of sir/madam?
That I don't know. But in a lot of scifi they call everyone sir. I think the Mr/Ms term has been suggested as Mx but no one knows how to pronounce it.
The way it was introduced to me was "mixter", like "mister" but with the 's' replaced with an 'x', so that's how I've always pronounced. As for a gender-neutral sir/madam, I haven't heard one myself. The closest I've heard is the word "gentlefolk" to add to "ladies and gentlemen".