I think I posted this a few years ago, but here it is again (true story):
About three or four years ago, I was invited to a "Christmas Party" (or whatever the heck it was called - it was sometime early-mid December) at the GOA SF Metropolis house (where Met. Anthony of blessed memory resided - I think he reposed just a month or so later). When I got there, on the large dining room table was your standard Greek fare including Pastitsio, Mousakka, a plate of drumsticks (chicken) and other contraband. I was a little taken aback, but went with the flow. Well, a retired Bp. Anthimos was in town and came out of wherever he was hiding when it was time to eat (Met. Anthony was away). This young woman who worked in the office, right when we started to eat said (I was surprised she dared), "Wait, aren't we supposed to fast right now?" Well, +ANTHIMOS then said (you could tell with at least a touch of sarcasm), "Well, when a bishop is present, and blesses it, then it turns to fish!" (maybe there were a few chuckles - I don't remember.). I was just polite and ate it. At least when they made us take leftovers home, I only got to take the bowl of Sun Chips while my friend I came with (who was also surprised) got stuck with all the chicken.
As a previous poster said, I just eat my Thanksgiving feast sans guilt.