In all the dorms at Steubenville, the RAs would wander around before they went off duty and bless all the doors in the building with holy water, as well as any students still up studying or socializing.
If we were in a girls' dorm when it was this time, the RA would poke her head in the door and ask, "Would you like a blessing?" If we said yes, she'd come in, dip her thumb in holy water, and trace the sign of the cross on our foreheads. (She'd then, of course, remind us that our male guest had to leave shortly.)
If you were in a guys' dorm when the RA was doing his rounds, he'd poke his head in and ask if we wanted a blessing. If we said yes, he'd take the holy water bottle and shake it at us, sprinkling us liberally with holy water, before reminding us that the ladies had to leave the building very soon thereafter.
The differences between men and women. Love it!