Georges St-Pierre -- Partying Hard in Miami After Quitting UFC [Video]

Georges St-Pierre isn't letting a few life-altering personal issues put a stop to the party train ... in fact, the former UFC champ hit the clubs HARD in Miami just a week after announcing he was taking a break from the Octagon ... and TMZ has video.

GSP was out raging at LIV Nightclub in Miami November 25th -- just a mere 7 days after his last fight where his face took a beating -- singing along to the music, drinking beer, and dancing with a random brunette on the club floor. You gotta see it.

St-Pierre announced his temporary retirement after a controversial win over Johny Hendricks.