Yes, overnight guests of the same sex are allowed. No, overnight guests of opposite sex are not permitted. All guests must leave a picture ID and sign in at the main desk of the residence hall. Only two guests are allowed to be signed in at the same time. Students are not permitted to have animals or reptiles in the residence halls.
Different students have different preferences.
Returning students get to reserve rooms first based on seniority. Tower Hall has more singles so upperclassmen tend to get those rooms first. As a freshman you will most likely live in a double in Marian Hall. Coin and credit card operated washers and dryers are available in each residence hall. It costs 75 cents to wash and 50 cents to dry a load of laundry.