Totally up for anything with these three:

Crowley (onlyanapple) - Will be actively finding ways to drug people with said treats. So if you have a character who won't eat, castle given food willingly and still want to play. He will find a way.
Maladict (mal_addict) - She's taken but hey still up for whatever.
The Once-ler (whichwayyoulean) - Still on his loss so he won't have a complete meltdown about this sort of thing for once. Yay?

Bunnymund is avoiding this like you wouldn't believe because it's Not His Holiday and also he's a freaking rabbit. Every day is Single Awareness Day to him anyway.