I have to say, that I'm 45 and on my first cruise I didn't know what FOD was, but as soon as I saw it on the daily patter, I knew what it was. Even though I had never heard that term used before.
Now they have changed it to GLBT. I was looking for FOD and was so disappointed that they no longer had FOD meetings. Only after looking a little closer to the patter, I saw GLBT. Dah, then the bells went off.
Basically, it doesn't matter what they put it under to me, I will attend either one. I like to meet all others FOD, GLBT.