Crowbar are a sludge/doom band from New Orleans, Louisiana.  Originally formed in 1988, Crowbar is widely considered to be one of the most influential metal acts to come out of New Orleans, a city well known for it's own unique brand of heavy music.  Crowbar were one of the premier bands to play sludge and doom metal, and after 25 years are still widely influential.  Crowbar have also been associated with many other premier acts in heavy metal, and (past and current) members have played with such bands as Acid Bath, Soilent Green, Goatwhore, Down, and Eyehategod.