I agree with Senusret I also.
You mentioned joining a fraternity as a means of being involved on campus. Are there NO OTHER clubs/activities on campus that are active, notable and serving? And why did you waiting until your senior year to become involved anyway?
The implied lack of involvement on campus isn't something we typically look for in someone wanting to join.
Lastly, as one who holds a degree in business, I suggest you sharpen your communications skills. It's very difficult to close any type of business deal if one is unable to clearly and efficiently make one's point.