Fights are personal
Fights are usually not planned, they evolve from a minor disagreement and then escalate to violence. This means fights are up close and personal; the opponents are in each other's faces. The first attack is usually a push followed by hand attack, such as a punch or slap to the most offending body part—the face. However, not all fights progress this way, so be prepared for an unannounced attack, do not get sucker punched.
In fights, kicks are rare. Since the range is so close, there is not enough room to execute a kick. A knee to the groin is a possibility, but generally people want to attack the person, and the body part that most defines the person is the face. Low kicks may work, such as stomping the foot, raking the shin, or side kicking the knee, but since fights end so quickly, it usually never comes to this.
After a few punches are exchanged and the fighters begin feel the pain, they start grabbing and holding and jerking each other around until they drop to the floor where they begin struggling and rolling around. This is usually when spectators or bouncers begin pulling the fighters apart to break up the fight.