New Delhi, Oct. 8 -- At 103, Irvin Koch is still behind the bar, serving drinks to customers from the basement of his home in Pasadena, Maryland - a routine he has followed for more than six decades.

According to The Washington Post, Koch, widely known as Irv, has been tending bar at his basement tavern since 1963. By unofficial accounts, he may be the world's oldest bartender.

His bar, Club Sunset Knoll, is a low-key drinking spot that has remained largely unchanged for decades. Located in the basement of the waterfront home Koch bought when John F. Kennedy was president, the establishment is known for inexpensive drinks, dim lighting and a jukebox.

There are no formal opening hours. Irv operates the bar according to his own schedule....