Some of the events in the game only show up when Ariane just wants to be friends. You must start with Start of a Romantic Evening first.

This path is available in the help section of the game. On the main menu click “Help” then click “Paths” on the top row, and next to where it says “Things to do with Friends” click “Enable”, then load up a save of “Start of a romantic Evening”. Correct choices will be highlighted in Magenta. Note: Where there is more than one choice, you might have to do one, then the other when you get to the choice page again. If you did not save an opening, enable “Start of a Romantic Evening” as well and start a new game from the beginning.

Dance
Keep dancing
Punch the guy (this is a bad choice)

Ariane now just wants to be friends. In friends mode she may flash her boobs or butt, but will never get completely naked. There are things she will only do with friends. Get out of the club again the same way then:

Go to the kitchen for dessert
Eat Dessert and go somewhere else
Go to the kitchen
Accept the suggestion (play board game)

The game accurately simulates the ending of a typical Parcheesi™ game. I picked the game because it is a 500 year old game from India and therefore in public domain, and the board shown in the game is also a CC image by Micha Rieser from wiki commons, but the name Parcheesi™ is a registered trademark of Hasbro in the US, so I had to change its name to the original Hindi name.