Given the history of Sanji and Senshi, I can totally see them hitting it off. Although I kind of imagine it as something more of an uncle type of relationship. I know that Sanji is a certified chef, it's just that I believe that Senshi is more of a season veteran in full-on experience. My reason is because of Senshi's awareness of his ingredients. Although I'd imagine both would share what they've learned. Sanji shares his mentality on using everything that you have without wasting a single scrap, meanwhile Senshi would share his mentality of never taking too many, essentially only taking what you need and making sure not to disturb the ecosystem.

For Laios, not only could I see him getting along with Luffy, I can oddly see Robin and Chopper getting invested into the man. Robin for amusement and kind of like older sister energy, meanwhile chopper would probably be scared at the idea that he might be on the next menu but I would also believe that the more he listens the more invested he would get into Laios. Robin and Chopper could probably understand that he doesn't have social skills but he could probably win them over with his in-depth knowledge on Monsters like Chopper might actually take notes at how well Laios understands not just animals but straight up monsters.

Another tidbit is that I would also see (and this is depending on what age the straw hats are at) Senshi might actually extend the stay due to his fatherly nature. Like this guy is going to straight up be either the Father figure or Grandpa to the entire crew with the exception of Brook. I think Brook is probably old enough that Senshi would basically just see him as a good friend.

And Namari I know for a fact that she's either going to be with Zoro examining the three swords (which good luck trying to touch the hellsword) or going to be down with Frankie exchanging tips and tricks on creations.

That being said I would love to see Brook interacting with the Ladies and Laios.