Robert: Seduce - middle two options (with options for tasting/swallowing cum).
Finn: A rich DJ - Seems like his max score is 8 unless you let him fuck you for a (possible?) perfect 10.
Justin: Has a girlfriend and was tricked into the contest. His vote can't be swayed.
Game Version 0.5.3.2: The event takes place on June 2nd. You may find a paper on the beach. If you read it, you'll find some details about the event, and you can sign in for the Bikini Contest on the telephone. If you win, the second round will take place on June 30th.