An excellent game, but unfortunately not it.Is the game Ariadne? It's been awhile but I think that may be what you are looking for as it has a scene with money being put in the characters bunny costume the same as you had described.
I remember the layout of the tavern now. It had two sets of staircases on the far left where you came in.
Downstairs leads to the ero-trap dungeon, up leads out I think.
If you went right you arrived at the tables in the gambling hall/tavern.