Black lounge suit

Just as morning dress is considered the formal daytime equivalent of formal evening attire dress coat i e. white tie, so the stroller is considered the semi-formal daytime equivalent of the semi-formal evening attire dinner jacket, i.e. black tie (also called tuxedo).

Wearing a black lounge suit the traditional way with formal trousers largely fell out of use following the counterculture of the 1960s, although its practice has still been observed occasionally ever since.

In German it is also known as Bonner Anzug (English: "Bonn suit") after the capital of post World War II Western Germany.

Winston Churchill is depicted in many photographs and paintings wearing a black lounge suit and striped formal trousers while serving as Prime Minister of the United Kingdom.

The stroller's apparent decline in use, as opposed to the staying power of its evening counterpart the dinner jacket, could be attributed to several factors: daytime formality in general, and specifically the standard of changing clothes for various occasions, fell out of general use in post-World War II Western culture; and strollers were sometimes associated with uniformed servants, a concept which had also fallen out of favour.

[4] Gentlemen's valets of the early 20th century are often depicted in television and film wearing black lounge suits as their standard apparel.

The character of John Bates of Downton Abbey (2010–2015) typically appears in a stroller while serving as his lord's valet.