You should share duties with your roommates.
John and his roommate agreed they would clean the apartment together and today is cleaning day.
John wants  to go to a friend's house.
John spends a couple of hours cleaning the apartment with his roommate before going to his friend's house.
John goes over to his friend's house without doing any cleaning at all.
John's roommate happy that John took his share of the responsibility for cleaning their apartment.
John's roommate thinks that John is lazy and selfish for leaving them with all the cleaning.