A cast-iron skillet. For those without
Dungeon Fantasy 10: Taverns:
Frying Pan: Swing as small mace at -1 damage [Axe/Mace-3] or block as a light shield [Shield-2].
There are many other options on p. 12, all suited to bars and dining establishments. To avoid the skill penalties, take the Improvised Weapons (Kitchenware) perk on p. 8.