Justin Bieber ditched his sometimes-hookup Kourtney Kardashian at The Nice Guy on Friday night and went out to 1Oak with his homies on Saturday, instead.

The Biebster showed off his style in black leather pants, a newsboy cap and Vans, as he was surrounded by a seemingly huge entourage. We can't tell which of these dudes were just by-standers and which were actually WITH Justin, but the fact is, everyone wants to APPEAR to be with JB! Noticeably absent were the ladies, however ... We're guessing plenty of girls pounded in Justin as soon as he walked in the door.

One of those girls was NOT Kourtney Kardashian, however, who waited and waited for Bieber to show up at The Nice Guy on Saturday night. And one of those girls was NOT Hailey Baldwin. After a two-week love fest in the Caribbean over the holidays, it's obvious that Bieber just hit it and quit it. In fact, the two "friends" having been hanging out, even platonically, since their Anguilla vacay. So sad ...