I too like these discussions on formal attire, but it reminds me of two weddings I was invited to. The first was Black Tie, there was no mention of optional or preferred, simply black tie. Now, as I do not own a tuxedo, I rented one. When I got there it was clear from the variety of different tuxes that most attendees owned their own, and the colors of cummerbunds, vests and ties was quite dizzying, although most contained some black. There was even one that the vest and tie were a black and white pattern like the skin of a cow (or a gateway computers box).

Now the second wedding, in the same family, was Black Tie Optional. I again rented a tux. This time knowing the crowd and that more leeway seemed to be allowed I selected one with a dark red and black vest and tie. The red and black were colors associated with a club that both the groom and I had been in. Well once again I guessed wrong. While there were a few who were not in formal wear, those that were all had solid black ties.

Boy was my face (and tie) red.