The threads about dress codes reminded me of this. For a high school reunion a number of years ago, the planners sent information to alumni stating a formal dress code for the dinner. My friends from school and I talked about the dress code, and several of them were hesitant to attend because of it. We all wondered if the planners were confused about what "formal" means. Surely, they didn't mean formal.
Lo and behold, another mailing went out and the dress code was softened to cocktail. Apparently, the RSVPs were slow, so the planners thought changing the dress code would help.
Then a third mailing went out with a new dress code: church clothes. We were asked to pay our share of the dinner cost in advance with our RSVPs, which I did.
Given the multiple dress code options, I ended up wearing a LBD. A friend wore a burgundy street-length dress. The reunion planners were all in black cocktail dresses. Other attendees were wearing a variety of clothing, including jeans, sport coats, street dresses, dress pants, etc.
The kicker: When we arrived at the dinner, we were informed that we had to pay extra for our meals because they didn't get enough RSVPs to cover the cost of the meal.