Ryan Garcia 's boxing career is currently on hold, but his ability to party is still clearly going strong ...

the star pugilist was spotted out at a nightclub in Hawaii this week, getting down on the dance floor without a shirt on. The 25-year-old -- who was just recently expelled by the World Boxing Council for using a racial slur on social media -- hit up The District on Thursday night in Honolulu to blow off some steam ..

. and check out some footage TMZ Sports obtained, you can see he clearly had a good time at the hotspot. King Ry was seen without a top on in the middle of a dance circle .

.. before he started shadowboxing to the beats that were blaring over the speaker system.

Later, Garcia fired up clubgoers from inside the DJ booth -- still without a shirt on. It might, though, be the last time we see Garcia out for a while ..

. because the young fighter said in a video Friday -- just hours after his night out on the town -- that he's gearing up to head to rehab . Garcia said in his vid he's "gotta handle some things, but after that, I'm going to check myself into rehab and get better.

" "In the next couple months," he added, "you're going to see a change.".