Thank you for everyone's advice.
I was really into the zone the other day, then all the sudden the owner assigned a group of ball bangers with a 4 or 5 years old child next to my table. Needless to say, the child would stand in front of us when we shoot and he would move in whichever way he felt like. The ball bangers would be in the way of our shooting and would take forever to shoot. They were waving their cues in the air, talking really loud and somehow liked to stand on our side of the table when they chat.
Me and my friend decided to move to another table, only to find a worst situation. People were gathering around our table to talk, and the owner would not do anything about that. He believed those were his valued customers and had as much right as any of us. He liked to clean the balls up by rubbing them when they were in the tray, and he was making all these noises when we were down on our shots.
Anyway, I totally failed to focus and it is a shame because I was really playing well before this happened.
Another problem was that my opponent was a very slow player and he had a very unique stroke. As I was watching him shoot, and trying to fight all the demons in my head, I found that I was starting to shoot like him.

It felt as if my rhythm was totally gone and I was following his!
Believe me, it was like a nightmare.
I felt so bad about myself. It shows how immature I am as a player and how incapable I was in staying focused.
Richard