A bar's owners and managers choose the bar's name, décor, drink menu, lighting, and other elements which they think will attract a certain kind of patron. However, they have only limited influence over who patronizes their establishment. Thus, a bar originally intended for one demographic profile can become popular with another. For example, a gay bar with a dance floor might, over time, attract an increasingly straight clientele. Or a blues bar may become a biker bar if most its patrons are bikers.
A cocktail lounge is an upscale bar that is typically located within a hotel, restaurant, or airport.
A full bar serves liquor, cocktails, wine, and beer.
A wine bar is an elegant bar that focuses on wine rather than on beer or liquor. Patrons of these bars may taste wines before deciding to buy them. Some wine bars also serve small plates of food or other snacks.
A beer bar focuses on beer, particularly craft beer, rather than on wine or liquor. A brew pub has an on-site brewery and serves craft beers.
"Fern bar" is an American slang term for an upscale or preppy (or yuppie) bar.
A music bar is a bar that presents live music as an attraction.
A dive bar is a very informal bar, sometimes referred to simply as a "dive."
Entertainment
Bars categorized by the kind of entertainment they offer include:
Blues bars, specializing in the live blues style of music.
Comedy Bar specializing in a stand-up comedy entertainment.
Dance bars, which have a dance floor where patrons dance to recorded music. But if a dance bar has a large dance floor and hires well-known professional DJs, it is considered to be a nightclub or discothèque.
Karaoke bars, with nightly karaoke as entertainment.
Music bars, specializing in live music (i.e. concerts).
Salsa bars, where patrons dance to Latin salsa music
Sports bars, where sports fans watch games on large-screen televisions
Topless bars, where topless female employees dance or serve drinks
Patrons
Bars