First, here is a map of where the Bentley Shuttle arrives in Harvard Square. You can even see the Bentley Shuttle in the picture there if you do the person view.
http://www.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=110+Mount+Auburn+St,+Cambridge,+MA%E2%80%8E+&sll=42.399883,-71.132011&sspn=0,359.709549&ie=UTF8&ll=42.373009,-71.121986&spn=0.001082,0.002269&t=h&z=19The shuttle schedule can be seen here (click the Harvard Square one):
http://www.bentley.edu/student-activities/shuttle-service.cfmYou'll want to take the 8pm or if you have to 8:30pm from Harvard Square.
Then you can get the hell out of my face and take the 12:30am, 1:30am, or 2:30am departing from Miller Hall.