Rules when I lived in the house (97-99)
-No boys above the first floor
-No alcohol (even if you were 21)
-No propping open of doors
-Practical jokes were to stay in good taste (this initiated b/c we had some horrible pranksters my sophomore year)
Fun rules:
-Last person to yell "Not it" or put their finger on their nose had to answer the phone/doorbell. I still find myself yelling "Not it!" when the phone at work rings