First thing's first: not everybody will enjoy this film.
That said, if you like seeing fights that are designed to entertain and not shock with graphic violence/brutality, enjoy the bravado of men being men yet bonding at the same time, and don't mind a bit of swearing (okay, so there's an F-word every two or three minutes), then there is a pretty good chance that you'll enjoy this film.
The film starts out with the introduction of Three Fellas (alternative title - and I can't think why "Bar Legend" is the common one) kicking off with three monkeys over as ridiculous a reason as neither wanting to move aside for the others to cross over a bridge, despite there being ample room for them all. Actually, the film does an excellent job of mocking thug mentality, but that's not so obvious to viewers after just action or something dark... who - unfortunately - will be quick to criticise the masterpiece that this film is.
As with Wild Card - another awesome Korean film well worthy of any man's time - there's not a great plot or anything to give away, but it's the characters, the dialogue and the developments which make this such a cracker. Contrary to the aforementioned, Bar Legend is p*ss your pants funny and the fight scenes are constant and always get your heart pumping.