Folded three times is the correct answer. This isn't a matter of taste, it's a matter of rank.

• ChinatsuI heard it's been four folds since last year.
  Ayu (Ayupan)That's a trend. This is an aesthetic.
• Goda TetsujiHey, where do you even buy those
  Terada MakotoLook at Goda's face, this is front-page material.