Just wondering what kind of house rules you use for this. Things like barroom brawls are such a common trope in most games that I can't understand why they don't get covered more. I know about the 75% subdual damage optional rule, but always like to see other "fixes" in case there's something more seamless. I hate math!
Here's mine:
All damage is considered subdual damage (whether by fists or weapons such as chairs, clubs, flat of the blade, etc.) that heals at the rate of 1 hp/turn except for a number of hp equal to the number of times the character was struck (so basically, every attack does 1 hp of "real damage"). If reduced to 0 hp, the character is knocked unconscious for one turn when he revives at 1 hp. If the character is reduced to 0 hp and the subdual damage was caused by a weapon, the character must make a saving throw vs. poison or else half of the damage is considered "real" (the character can only recover 1 hp/turn up to half his normal hp).