Translation of irresponsible in Spanish

Anyway, we left, as everybody else was leaving and once outside we understood that most people were just crossing the street in order to enter into this other night club. So did we.
They were floating in self made tubs and rowed with sticks. When they reached our boat they tried to sell us beverage. We vigorously denied them access to our boat. It just did not help.
Yes, I know that because I have visited there. I speak German and I am working on my Spanish. Where are you from originally? Are you going to a some language school and what is the best way to learn for you?