Nick Hogan works out a bikini contest at Hulk Restaurant before his DUI arrest

TMZ obtained video from Friday’s event at Hogan’s Hangout in Clearwater… and you see Nick working from the DJ booth, playing music and introducing some of the winners.

Hulk was one of the judges, and was also hosting the bikini contest, which included $5,000 in cash prizes for three winners… with Nick serving as MC/DJ.

When the contest started, Hulk announced that they would be giving away free shots… which is interesting because… as we first told you, later that night Nick is arrested On suspicion of driving under the influence of alcohol.

Nick has yet to address his DUI case… which comes 16 years after a scary car crash in Clearwater that left one of the passengers severely brain damaged… but now we know what he was doing earlier in the night.