Wow, you guys are a lot busier than I was when I was in school! I took a pretty light schedule, though....
I would generally have 2 classes a day... one around 10-12 and another from about 1-3, and once a week I'd have a night class running 6p-9p. On the days I didn't have that night class, I'd usually work from 3-5 or 3-6 each day at my on-campus job.
Monday nights from 9pm - God only knows (usually 10:30 or 11:00, although we did go to almost 2am once....) we would have our sorority meeting, and traditionally would meet up with other fraternities and sororities afterwords to hang out, or if you were 21, that was the big greek night at the bars. (free pool!)
Add in a few interspersed meetings here and there during the week for exec board and stuff, and that was pretty much it! The rest of the time was spent studying, hanging out with friends, and most importantly, sleeping