Yes. They had a buffet on the 5/27 3-night Wonder. It was on Friday night (Nassau). They started with a Tropical deck party from 10-11:45pm and the buffet ran from 11-11:45pm. On deck 9 at the Goofy pool. There were two sides to the buffet, one contained all desserts and the other had appetizers.
On Saturday night (Castaway Cay) we visited the Promenade Lounge for an after dinner drink. At 11:00pm they started setting up a small buffet area right outside the lounge. I didn't see it listed on our Navigator anywhere, but they had small finger sandwiches, a few hot items and desserts. Edited to say: I stand corrected, I just checked the small print on the back of my Navigator and it does talk about late night snacks being available from 11 to 11:45pm at Route 66 and the Promenade Lounge.
I still can't believe how much food I ate on that trip.
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