Club

The club is one of the oldest weapons known to humankind. Any blunt object that can be swung and made to cause damage can be considered a club. This would include table legs, columns or tree trunks (for giants and other large creatures), or as cited in the module Isle of Terror, a dumbbell. Clubs can be of literally any material that exists.Clubs will cause Crushing damage against enemies.

Club-like Spell Effects
Spells such as Shillelagh mimic club effects, or create magical clubs of increased damage.

Construction and Magical Effects
Again, since a club can be made of any material, anything solid and somewhat lengthy can be one. Many stories feature hill giants and frost giants using entire trees as such.

Clubs can carry any enchantment typical to other weapons. Again, the only limitation would be the enchanter's power, and the material of the club itself.