Those Bostonians sure know how to drink!

After his Boston stop on his Purpose world tour, Justin Bieber partied the night away at the Storyville night club and amazingly enough managed to run up $2,400 bar bill for tequila and vodka. That's a lot alcohol!

Clubbers caught the 22-year-old on top of the bar doing shots and allowing people to take pics of the whole thing -- because what else would he be doing?!

TMZ reported that a rep from a Boston marketing company 6one7 Productions, which handles the club, said that the "Sorry" singer wracked up the hefty bar bill buying people drinks and partying the night away with legions of onlookers.

The site also says that before JB hit da club, he started his raging at a bar called The Tam, where he ordered shots of Fireball whisky for a group of men and women.

We always say that the Biebs goes craaaaaaaazy on tour -- the Purpose tour seems no different!