Saloon

Saloons are a type of bar that is found through the American west during the time period of Red Dead Redemption. Saloons are places offering luxury comforts and catering to frontiersman by providing alcohol, gambling and prostitution among other services. Saloons were popular social institutions and facilitated many major roles for small frontier communities, often doubling as community centers.

In Red Dead Redemption, players can purchase drinks, gamble on card games, five finger fillet and liar's dice.

It is possible for the player to get in a bar fight if you bump into NPCs, or when cheating at poker. However that is nothing compared to a duel that you might get challenged to while relaxing.

Locations
the town of Armadillo

The Port of Thieves Landing

Achievement
Getting into bar fights, in a saloon, will allow players to obtain the following achievement:
 * Fightin' Around the World: Knock someone out in melee in every saloon in the game in Single Player.