The Greek Bouncer was a bouncer for Minos Sakkoulas' club.
After Sakkoulas left Sydney in the basement of his club, Sakkoulas had his bouncer watch over Sydney until he came back. Sydney desperately tried to leave the room after the bouncer repeatedly suggested she should stay, but since he wouldn't let her, she knocked him out and broke out of the room.
When he woke back up, he grabbed Sydney from behind and let Sakkoulas lick her on the face. Before he could do anything else, Dixon showed up and punched him in the back of the head, knocking him out again.