You may want to look on this website to get a sense of different perspectives. Student lives can differ dramatically depending on whom you ask. It also depends on whether you are a first year or second year.
Take a look at the blogs, below, for starters:
Even better, come for a campus visit when they restart in the fall.
Wharton is really what you want to make out of it. Most students probably have two to three 90 minute classes a day between 9 am - 4:30 pm. Many students will then take on extracurricular activities or meetings until the evening when they will either embark on homework, studies, and/or socializing. Thursday late afternoon/early evening, many students go to Pub to drink beer and eat pizza (aka - be merry) with their fellow students and some faculty. There are almost no classes on Friday. Weekends: up to you.