A club is a blunt weapon used to cause percussive or bludgeon damage. Essentially cylindrical, a club may be made of any substance, although materials with more density will cause more damage to the target and will survive more uses. Swung one- or two-handed, the club is the earliest of weapons, and is still in widespread use today.
In RL terms, a "quick" source of club-like objects is the purchase of pickaxe handles (in the UK; the French ones taper the wrong way). This gives an oval-section head, with the weight in it, and a round/oval section handle.