First semester of my freshman year, I had 7:30AM classes five days a week. Two of those were labs that if I missed more than two of I'd fail the course.

But honestly, that's because of a lot of different things, notably being in the freshman engineering program and the way they block scheduled things. Really, if you pick the right major, you can have your earliest class be Underwater Basket Weaving at 3 in the afternoon. Plenty of people do it. It just depends on how committed you are to not doing work in college.