$5.00 Yarn Night - Payment and Experiences

Does anyone know if we receive payment for our $5.00 yarn nights the same as we do for our regular classes? Is it 90% of tuition minus our hourly rate? If yes, what happens if we only have 2 or 3 students? I had my first yarn night last night and I had 9 students. For two hours, I rotated between the 9 students to help with their projects. I didn't feel that I was able to give enough attention to anyone but I guess that's that realizaiton of a $5.00 class because you get more students. I would be interested in hearing about other instructor's $5.00 yarn night experiences.