Justin Bieber — REJECTED by NYC Nightclub

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Poor little Justin Bieber wanted to party his face off Monday night … but His Douche-ness was brutally shot down by one NYC nightclub … because he”s still a baby in bar years (i.e. under 21).

Our NYC party sources tell us … Biebs and his crew showed up to Griffin Nightclub in the Meatpacking District around 2:00 AM … looking to drop serious coin on bottle service.

But money can”t buy everything … we”re told JB was DENIED entrance by the club”s security because he”s only 19 — making his presence a potential problem (see Chicago earlier this month).

Not to be defeated … Biebs and his posse were shot minutes later cruising into another club, Catch … where he probably just sipped water.