Sitcom Kitchens Stairs

Stairs to the second floor are in a lot of sitcom kitchens, mostly in family sitcoms:

Sister Sister
Clarissa explains it all
Boy meets world
step by step
hogans familygrowing painsfull housefamily mattersCosby showI guess they felt that a lot of family interaction would be in the kitchen so they wanted as many entrances as they could possibly have. If you watch shows like Perfect strangers, My Two Dads or Silver spoons, some episodes never even step in the kitchen, or its an open area so the kitchen is apart of the living room/dining room.