Buy meat, all the meat! Invite her to eat it with me and organize a huge BBQ party! (Because meat is awesome, Rumia is awesome and parties are awesome)
What if...
You met Yuugi in a bar, drunk (obviously) and challenging you to an arm wrestling contest. If you win, you get her legendary sake cup, which improves the quality of every drink poured in it. (By the way, that's what it does in canon) If you lose... well you know.