It's a Living S01E08 - Up On the Roof

The Los Angeles fire department informs the staff of Above The Top that a fire has broken out several floors below the hotel where the restaurant is situated at and that they are to keep the customers there until the fire is put out, but the situation gets chaotic when a hysterical woman wearing a blue bathrobe races into Above The Top and yells that the building is on fire and that the emergency exits are covered in smoke, causing panic amongst the customers.  The waitresses take charge of the situation and keep the customers calm until Nancy informs them that the fire department is sending helicopters to the building to rescue the patrons of Above The Top at four customers at a time.  Hours later, with the restaurant closed and the customers safely rescued, Nancy, the girls, Chef Mario, and Sonny sit out the fire until the fire captain shows up and informs them that fire has been completely put out and that everyone can the leave premises.