[quote=“cygnus maximus” post=15113]My understanding:
The terms Dined In and Dined Out used to mean that the Mess Members paid for the meal of the arriving or leaving members. However, a Dining In Night (sometimes shortehed to a Dining In) is the term used for the function itself, not what goes on at it. However, people may be Dined In at a Dining In; they could also be [i]Dined Out /i.
Formal Dinner, Mess Members only, nobody leaving = Dining In Night, but new Mess Members may also be Dined In and sometimes people Dined Out.
Formal Dinner, Mess Members only, someone leaving the Unit or the Service and to whom the Mess wishes to formally say farewell/thank you etc, those individuals are Dined Out, see above; I’ve never heard of a ‘Dining Out Night’.
Formal Dinner, Mess Members with their Guests, be they spouses, or guests of the Mess, VIPs etc = Guest Night, but people may also be Dined In and Dined Out at Guest Nights.[/quote]
You’re not wrong.
However, the dining in = unit/dining out = unit + guests difference was (probably) invented (and used) by the RAF and taken to the USA by the USAAF who adopted a lot of RAF customs when they became the USAF post war.
It’s since fallen out of general RAF use, but remains, in an etiquette sense, correct. I would suggest that the term ‘dining out’ has been dropped because of the confusion with people being ‘dined out’ (which could happen at a dining in or a dining out) and replaced with the eminently more sensible ‘guest night’.
All the above, however, doesn’t change the fact that, if you have guests at your cadet squadron dinner, and whether you may or may not be dining someone in or out, it’s not a dining in.
I hate formal dinners.
On topic: horse was a popular choice this time last year…but seriously, can’t you just get your caterers to sort it out? If people don’t eat it, they don’t eat it. As long as they don’t fling the bones over their shoulder you should be alright.