Jon had learned about this particular holiday during his stay on the island. Mardi Gras was one of the magical parties where food and drink were unending and anything could be obtained - but only until midnight. He was eager to see if that would be the case here in the Nexus and he dressed appropriately - in a dark suit and a mask with a wolf's face. Only appropriate.

One of the first tables he went to had drinks and he picked one that resembled the hard cider that Robb so liked to brew.