I think Girl Piece prsents a very fun opportunity to reverse Nami and Sanji's usual dynamic
Nami whould try to flirt with Sanji to get her to reduce the price (he's not actually interested in her of course, he's just doing get free food) and Sanji responds with "Yeah, sure, whatever :/"
That's probably not the dynamic you had in mind but I think it whould be funny
woah… she’s bisexual, I didn’t know that!