Blind Man's Bluff

Blind Man's Bluff is a gambling game of chance where participants take it in turns to zap themselves with a wand containing a Blindness spell. After Lindie Asklepa accidentally blinded herself by gazing too deeply into the Void inside Scarlett Dargent's Silver Apple, Katib Hugo Dargent claimed to Doctor Sterling Medicant that she had blinded herself in such a game. This was after the doctor had already seen through Hugo's first lie, that Lindie had blinded herself with Concubine makeup.
The game is technically illegal since it uses a Malediction spell in its playing. However, since players only cast the spell on themselves, in practice the City Watch turn a blind eye. No-one has ever actually been arrested for playing Blind Man's Bluff.

Legality

Technically illegal
Note: City Watch turns a blind eye, since the Malediction spell used is only ever self-inflicted.