Many years ago some cruise lines actually opened their entertainment wardrobe to guests to dress for theme nights! This photo is from 1975 for a "French Apache" theme night. So much fun!
On the website, if you click on each of the routes it will tell you the cost. Our Lady of the Guard is 9 Euro, Old Marseille/Terraces is 9 Euro, Friuli is 5 Euro. Hope that helps!