The Straw Hat Pirates landed on an Island for some food, clothes, and according to Luffy- Adventure. Miraculously they made it to a pirate city- But that was the draw wasn't it? Pirate Cities were dangerous, lawless, and full of creeps. Nami had to keep her wits about her if she was gonna get what she wanted without stirring the pot. And make a little money on the side pickpocketing~