[jblow]

There's another factor: MMA fights are one-on-one in a controlled environment. If you get into a fight in a bar and take your opponent to the ground, his friend is going to kick you in the head and now you have a concussion. MMA fights and the styles that succeed most frequently in MMA are based around this kind of maneuver, and it works because you know you are fighting one dude and nobody else is going to bother you.

[St-Clock]

And:

1. The floor is likely slippery.

2. It's dark

3. Glass mugs/Bottles can be broken and used as a weapon

4. There are hard table corners (watch out if you fall!)

5. There are chairs in the way (or maybe they can help you if you like to wield chairs!!)

A football team once picked a fight in a bar with a kung fu school. One of the best Kung Fu student slipped on the floor and his 15 years of kung fu went out of the window very very very quickly :-)