Even though I don't go to Vassar (bf does) I can try to answer your question since there aren't too many Vassarians on CC. I don't think any college can give you a 'typical day' - the variety of people and what they might do is far too great. You will probably have a few classes (between 1-3 at Vassar, from what I've seen), and then some sort of extracurricular - sport, music, club - and then read/do work the rest of the night when you aren't hanging out with your friends pre/post dinner. From what I saw when I visited (3-4 times/yr) it really seemed that there was a good balance of work/socialization - at least where he lived, everyone was very friendly and did other things beyond work. I think that is fairly typical of any school, though - you might visit and just see the people that study all of the time/party all the time, when in actuality 90% of the students will fall between those two extremes.
On a whole, though, I found Vassar to have a strong sense of community and many 'fun' options when I visited, so I wouldn't worry about everyone being so serious about work all of the time, if that's your concern.
Hope this helps!