A dive bar, or simply a dive, is a drinking establishment (or sometimes a restaurant) with a dated or ramshackle appearance and atmosphere. In a dive bar, the drinks tend to be cheap and of low quality. The term "dive" dates from the London of the 19th Century when younger gentlemen wanted somewhere slightly more risqué to spend their afternoons than the great clubs frequented by their father. They formed more informal clubs where they smoked and drank coffee. These laid-back establishments were often full of leather couches and divans and quickly became known as "dives" for short. http://en.wikipedia.org/wiki/Dive_Bar A dive bar, or simply a dive, is a drinking establishment (or sometimes a restaurant) with a dated or run-down appearance and atmosphere. In a dive bar, the drinks tend to be cheap and of low quality, but frequently are of a high alcohol content. The term was possibly coined in the 19th century, when these types of establishments were often located below street level, and one could dive in for a quick drink. People tend to frequent dives for the sole purpose of drinking (or sometimes eating) inexpensively, and sometimes there are frequent patrons who appreciate the laid-back atmosphere. Dive bars often have outdoor commercial signage that appears dated. http://encyclopedia.thefreedictionary.com/dive+bar The term 'dive bar' was coined in the 1800's, when these establishments were generally located below street level, away from genteel and pampered respectable citizens. But what exactly defines a dive bar today? _ Cheap drinks. _ A jukebox with a selection that would satiate your punk aficionado older brother, Rat Pack adoring grandfather, and soul singer swooning girlfriend. _ The air of a secret hideaway you've luckily and unknowingly stumbled into. _ Patrons from every walk of life. http://www.closermagazine.com/v1/cl12/nightlife.html http://www.phrases.org.uk/bulletin_board/29/messages/422.html Why is a dive bar called a joint? Why is such a bar called a dive bar? Why is it called a bar in the first place? http://www.phrases.org.uk/bulletin_board/34/messages/926.html http://www.phrases.org.uk/bulletin_board/34/messages/941.html

I believe its a term used mainly in 'Muff' diving, and represents the horizontal bar that creates the resting place for your nose.

It's from the Doors Alabama song. whiskey bar.