"Are You Being Served", a 70s Britcom about a dysfunctional London Department store, usually available on PBS. Stock characters and situations, silly sight gags, stereotypes and barely naughty double entendres and only slightly off-color humor, but performed to perfection by a brilliant ensemble cast:

(from the Wiki article

Mrs. Betty Slocombe, head of the ladies' department. She is known for her changing hair colour and conversations about her cat, which she always refers to as her "pussy".

Mr. Wilberforce Claybourne Humphries, a camp man who lives with his mother.

Captain Stephen Peacock, the haughty floorwalker who purportedly fought in the North Africa Campaign of World War II but was actually in the Service Corps and never saw combat.

Miss Shirley Brahms, a young, attractive, working-class, cockney-speaking junior assistant to Mrs. Slocombe.

Mr. Ernest Grainger, a 40-year veteran of Grace Brothers who often falls asleep on the job.

Mr. Cuthbert Rumbold, the autocratic, obsequious (to Young Mr. Grace), yet bumbling and incompetent floor manager.

Mr. James "Dick" Lucas, the young, penniless, womanising junior salesman.

Young Mr. Grace, the very old, rich but stingy store owner, surrounded by attractive young women.

Old Mr. Grace, Young Mr. Grace's older brother who eventually replaced him at the store, when Young Mr. Grace retired.

Mr. Beverly Harman and Mr. Mash, the maintenance men who installed mechanised display units in store and were often scolded by Captain Peacock for being on the floor during opening hours.

The main humorous base of the series was a merciless parody of the British class system. This permeated almost every interaction and was especially evident in the conversations between the maintenance men and the ostensibly higher-class store personnel. The episodes rarely left the store, and to parody the stereotype of the British class system, characters rarely addressed each other by their first names, even after work, opting for their formal titled names ("Mr", "Mrs", "Miss", or even "Captain"). When they did address each other by their first names, it was almost either as an aside, or often for a comical effect (e.g., an underling addressing a superior).