For the original second pilot, which introduced the character of Penny, the original sets from the first pilot were modified to add an elevator next to the steps. By making the elevator nonfunctional, many scenes used the steps for a place for discussions by arriving and departing characters, random meetings and the subjects of visitors' complaints. The downstairs laundry room is also used for random meetings. The same set of stairs is used for all three sets of stairs by changing the hallway decorations and apartment numbers. A separate set is used for the building lobby.