Justin Bieber -- Board on the Dance Floor

Justin Bieber may not skate on his DUI charge ... but he made up for it by creating a new dance on wheels last night in NYC.

Justin hit up the annual "Leather & Laces" party Saturday night at the Liberty Theatre in NYC ... and created a spectacle of himself by doing kickflips to a Sage the Gemini song.

Two things:

Thing 1 -- Are you getting the feeling Bieber is obsessed with making a spectacle of himself?

Thing 2 -- Who the hell allowed him to bring him in a skateboard?!? Much less, skateboard inside.