This is why people think that students aren’t serious

One of my students was abnormally giggly in class the other day, which could have been the result of any number of factors.  Later, however, I had a student apologize for said giggly student’s behavior, explaining that there were really good deals at the bar the night before.  How much does one have to drink in order to still feel drunk at 11 am the next morning?  Hungover I could see, but still drunk?  Seriously?