Read preamble’s posts^^^^. Your posts indicate that you have no idea of the level of work expectations at the colleges. Your GPA has to be up high for most profitable careers; they do ask for GPA. Being pre-law tells me that you haven’t researched that the job market is weak for attorneys, and that marketing careers are competitive.
Minor “details” like getting good grades may impact your social greek life:
You can’t cram, like you did in high school. (My kids had 40 pages of intense reading per night just for their poli sci general ed classes; not including the films and articles they had to allude to in their papers.) Labs take a huge chunk of time. You will be assigned to groups, within your marketing classes, and you will be expected to meet with them on your off time. Group meetings are a pain and not everyone contributes fairly, which impacts your grade in class. Not everyone assigned to your group will be able to meet around your sorority events.
The “A” students read their syllabi and go to “office hours” or to the tutors. Believe it or not, these schedules actually impact your social life. How dare the professors schedule office hours that are inconvenient for your rush schedule!
My daughter had a class that only had one test for the whole semester. If she failed that test, she failed the class. Was it fair? No. Did anyone complain? No. Was it a good class? Yes.
Sports practices were held 3 times a week and the travel (yes, by flights) cut into their schedules, but they did read and try to study on the planes.
You need sleep at some point during the week, and with your proposed schedule, something will give; I predict that will be your GPA.